The atoms of neon are [tex]27.099 *10^{23}[/tex], moles of silicon are 0.1199 , moles of [tex]CH_{4}[/tex] are 0.56, moles of gold are 8.64, atoms of cobalt are [tex]157.7764*10^{23}[/tex] and number of cookies are [tex]7.2264*10^{23}[/tex].
How to calculate atoms?Multiplying the number of moles with [tex]6.022*10^{23}[/tex] we will get number of atoms of neon.
Number of atoms= [tex]4.5* 6.022 *10^{23}[/tex]
Number of atoms of neon = [tex]27.099 *10^{23}[/tex]
Moles of silicon?Number of atoms= moles * [tex]6.022*10^{23}[/tex]
Moles of silicon = [tex]\frac{1.2*10^{23}}{6.022*10^{23} }[/tex]
Moles of silicon = 0.199 moles
Moles of [tex]CH_{4}[/tex] ?Number of atoms= moles * [tex]6.022*10^{23}[/tex]
Moles of [tex]CH_{4}[/tex] = [tex]\frac{3.4*10^{23} }{6.022*10^{23} }[/tex]
Moles of [tex]CH_{4}[/tex]= 0.56 moles
Moles of gold?Number of atoms= moles * [tex]6.022*10^{23}[/tex]
Moles of gold = [tex]\frac{5.2*10^{24} }{6.022*10^{23} }[/tex]
Moles of gold= 8.64 moles
Number of atoms of cobalt?Number of atoms= moles * [tex]6.022*10^{23}[/tex]
Number of atoms of cobalt = [tex]26.2*6.022*10^{23}[/tex]
Number of atoms of cobalt = [tex]157.7764*10^{23}[/tex]
Number of cookies ?Number of atoms= moles * [tex]6.022*10^{23}[/tex]
Number of cookies= [tex]1.2*6.022*10^{23}[/tex]
Number of cookies= [tex]7.2264*10^{23}[/tex]
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Determine the quantity in grams of CO(NH2) that are in 0.57 moles of CO(NH»).
0.95 g
Answer: 34.24 g
Explanation: The molar mass of CO(NH2) can be calculated by including up the nuclear masses of each component within the atom. The nuclear masses of carbon (C), oxygen (O), nitrogen (N), and hydrogen (H) are 12.01 g/mol, 16.00 g/mol, 14.01 g/mol, and 1.01 g/mol, individually.
Molar mass of CO(NH2) = 1 x molar mass of C + 1 x molar mass of O + 2 x molar mass of N + 4 x molar mass of H
Molar mass of CO(NH2) = 1 x 12.01 g/mol + 1 x 16.00 g/mol + 2 x 14.01 g/mol + 4 x 1.01 g/mol
Molar mass of CO(NH2) = 60.06 g/mol
Presently, we will utilize this molar mass to change over moles of CO(NH2) to grams of CO(NH2):
mass of CO(NH2) = number of moles x molar mass
mass of CO(NH2) = 0.57 mol x 60.06 g/mol
mass of CO(NH2) = 34.24 g
Hence, there are 34.24 grams of CO(NH2) in 0.57 moles of CO(NH2). The answer isn't among the choices, so we have to be calculate the proper reply.
To discover the proper reply, ready to utilize the relationship between moles and mass:
mass = moles x molar mass
mass = 0.57 moles x 60.06 g/mol = 34.24 g
V
A student dissolves 11.S g of sodium hydroxide (NaOH) in 250. g of water in a well-insulated open cup. He then observes the temperature of the water rise
from 20.0 °C to 31.3 °C over the course of 6.7 minutes.
Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:
NaOH(s) -. Na (ag) + OH (ag)
You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 3
significant digits.
Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and
published values for this reaction.
is this reaction exothermic, endothermic, or neither?
Oexothermic
O endothermic
O neither
0.°
If you said the reaction was exothermic or endothermic, calculate the amount of
heat that was released or absorbed by the reaction in this case.
Calculate the reaction enthalpy AH.
nen per mole of NaOH.
kJ
According to the question the reaction enthalpy is thus 10610 J / 0.278 moles = 38.3 kJ/mol.
What is enthalpy?Enthalpy is a thermodynamic property of a system that measures the total energy content of a system. It is a state function that is expressed in terms of internal energy, pressure, and volume of a system. Enthalpy represents the amount of energy that is associated with a chemical reaction or physical change.
The reaction is exothermic, meaning that heat is released during the reaction. The amount of heat released can be calculated with the equation q = mcΔT, where q is the heat released, m is the mass of the solution, c is the specific heat capacity of the solution, and ΔT is the change in temperature of the solution. Using the given data, the amount of heat released by the reaction can be calculated as q = (250 g)(4.184 J/g-K)(11.1 K) = 10610 J. The enthalpy change for the reaction can then be calculated by dividing the heat released by the number of moles of NaOH, which is 11.1 g / 40.00 g/mol = 0.278 moles. The reaction enthalpy is thus 10610 J / 0.278 moles = 38.3 kJ/mol.
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After a jar of liquid has been sealed, the level of the liquid decreases slightly because of evaporation. After a slight decrease, the level of the liquid ceases to change. Why?
Explanation: The level of the liquid in a sealed jar decreases slightly due to the evaporation of some of the liquid molecules into the air space above the liquid. However, once the concentration of the liquid molecules in the air space reaches a certain level, the rate of evaporation will slow down. This is because the concentration of the liquid molecules in the air space will eventually reach a point where the rate of evaporation is balanced by the rate of condensation.
At this point, the liquid molecules in the air space will be colliding with the surface of the liquid at the same rate that liquid molecules are evaporating from the surface of the liquid. As a result, the level of the liquid will cease to change, and the liquid will remain at a stable level within the jar.
300.0 mL of a 0.400 M solution of NaI is diluted to 700.0 mL. What is the new concentration of the solution?
Answer:
the new concentration of the solution is 0.171 M.
Explanation:
To solve this problem, we can use the formula for dilution:
C1V1 = C2V2
where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.
Substituting the given values, we get:
(0.400 M)(300.0 mL) = C2(700.0 mL)
Solving for C2, we get:
C2 = (0.400 M)(300.0 mL) / (700.0 mL)
C2 = 0.171 M
Therefore, the new concentration of the solution is 0.171 M.
Which statement describes gases
according to kinetic molecular theory?
A. The gas particles have essentially zero volume and no attraction
for one another.
B. The gas particles have a large volume and strong attraction for
one another.
C. The gas particles have a small volume and strong attraction for
one another.
D. The gas particles have a large volume and weak attraction for one
another.
Answer:A. The gas particles have essentially zero volume and no attraction
for one another.
Explanation:
A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for when the recorded sound moves through the wave display.
a. The recorded waves are mechanical waves.
b. The recorded waves are electromagnetic waves.
c. The wave display does not change the wave type.
d .The the wave display changes the wave from mechanical wave to an electromagnetic wave.
e. The frequency or amplitude of the waves could change.
f. The frequency or amplitude of the waves will not change.
g. The wave display changes the wave from an electromagnetic wave to a mechanical wave.
Answer:
a. The recorded waves are mechanical waves.
c. The wave display does not change the wave type.
e. The frequency or amplitude of the waves could change.
These statements are true. Recorded sound waves are mechanical waves, meaning they require a medium to travel through, such as air or water. The wave display is a device that displays the shape, frequency, and amplitude of the sound waves. It does not change the type of wave from mechanical to electromagnetic, or vice versa. The frequency and amplitude of the sound waves could change, depending on the characteristics of the source producing the sound.
A new band sensation is playing a concert and recording it for a live album to be released this summer. Sound waves from singers in the band are displayed in the diagram below.
Answer:
Wave A (blue wave) has the highest volume because it has the highest amplitude.
Waves B and C have equal volumes because they have the equal amplitude.
Wave C (green wave) has the highest pitch because it has the highest frequency.
Waves A and B have equal pitch because they have the equal frequency.
A 1.000 g sample of an unknown compound containing only carbon, hydrogen, and oxygen was analyzed
through combustion analysis and yielded 2.224 g of CO, and 0.3035 g of H,O. What is the compound's
empirical formula?
The moles of carbon, hydrogen, and oxygen may not be whole numbers, we may need to round them to the nearest whole number to get the simplest ratio.
What is Empirical Formula?
The empirical formula of a chemical compound represents the simplest, most reduced ratio of atoms in that compound. It shows the relative number of atoms of each element present in the compound, expressed as the smallest whole numbers. In other words, it gives the simplest whole number ratio of the elements in a compound.
Mass of carbon = moles of CO
Mass of hydrogen = 2 x moles of H2O (since each H2O molecule has 2 hydrogen atoms)
Calculate the moles of oxygen in the compound.
Given:
Mass of oxygen = moles of CO (since each CO molecule has 1 oxygen atom) + moles of H2O (since each H2O molecule has 1 oxygen atom)
Determine the empirical formula.
The empirical formula represents the simplest, most reduced ratio of atoms in the compound. To determine it, we can use the mole ratios of carbon, hydrogen, and oxygen calculated in the previous steps.
Empirical formula = CxHyOz, where x, y, and z represent the mole ratios of carbon, hydrogen, and oxygen, respectively.
Now, let's plug in the calculated values for moles of carbon, hydrogen, and oxygen into the empirical formula:
Empirical formula = C moles : H moles : O moles
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The empirical formula of the unknown compound given the combustion analysis data is C2H3O.
Explanation:The first step in solving this problem is to know how much carbon and hydrogen in grams are in the carbon dioxide (CO2) and water (H2O) produced. From the mass of CO2, we get 2.224g * 0.2729 (proportion of carbon in CO2) = 0.607g C. And the mass of hydrogen is 0.3035 g * 0.1119 (proportion of hydrogen in H2O) = 0.034g H. The remaining mass is 1g (total mass) - 0.607g C - 0.034g H = 0.359g O. Then, we need to convert these values to moles. This gives us 0.607g C * (1 mole C / 12.01 g C) = 0.050 moles C, 0.034g H * (1 mole H / 1.01 g H) = 0.033 moles H, and 0.359g O * (1 mole O / 16.00 g O) = 0.022 moles O.
By finding the ratio of these moles, we get C2H3O, which is the empirical formula of the compound.
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Please tell me the reagent
Alkene is transformed to alcohol via the oxymercuration-demercuration reaction. The reagent employed in this reaction is mercury (II) acetate in tetrahydrofuran, which also serves as the solvent.
Oxymercuation-demercuration The result of 2-methyl-2-butene oxymercuration-demercuration is 2-methyl-2-butanol.Oxymercuration-demercuration is the electrophilic activation of an alkene by a mercuric acetate group. It is then followed by the addition of water and, finally, reductive demercuration by sodium borohydride.In the first step, an electrophilic HgOAc+ ion is added to the double bond, yielding mercurinium ion.In the second stage, the species combines with a nucleophilic water molecule. A bonding of a HgOAc group and an OH group arises on the nearby carbon atoms as a result of this nucleophilic attack.The final product involves the Markovnikov addition reaction.For more information on Oxymercuation-demercuration kindly visit to
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I NEED HELP WITH THIS QUESTION THANK YOU
The mole fraction of the solute in the solution is calculated as 0.1406.
What is non volatile solute?Non-volatile solute is a substance that does not readily evaporate at given temperature and pressure.
Raoult's law : P_total = P_solute + P_water
P_total is total vapor pressure of solution, P_solute is partial pressure of solute, and P_water is partial pressure of water.
Since the solute is non-volatile, we can assume that its partial pressure is negligible compared to the pressure of water. Therefore: P_total ≈ P_water
P_total = X_water * P°_water
X_water is mole fraction of water and P°_water is vapor pressure of pure water at same temperature.
305 torr = X_water * 355.1 torr (since P_total ≈ P_water)
X_water = 305 torr / 355.1 torr = 0.8594
X_solute = 1 - X_water = 1 - 0.8594 = 0.1406
Therefore, the mole fraction of the solute in the solution is 0.1406.
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Write word equations for the following skeleton equations. C2H6 (g) + O2 (g) CO2 (g) +H2O (g)
The word equation for the skeleton chemical equation would be Ethane gas + Oxygen gas -> Carbon dioxide gas + Water vapor.
How to write the word equation ?Described in this reaction, ethane (C2H6) and oxygen (O2) unite to synthesize carbon dioxide (CO2) and water vapor (H2O). The reactants are situated on the left side of the arrow marker, while the products are displayed on the right. All entities specified are presented in the gaseous state as denoted by the (g) symbol.
The word equation for the skeleton chemical reaction C2H6 (g) + O2 (g) -> CO2 (g) + H2O (g) is showcased as follows:
Ethane gas + Oxygen gas -> Carbon dioxide gas + Water vapor
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Draw a Lewis structure for CO32–, SF4 and HCOOH (formic acid)
The Lewis structures are shown by dots in the images attached here.
What is Lewis structure?A Lewis structure, also known as a Lewis dot diagram, is a visual representation of the bonding between atoms or ions in a molecule. It was developed by American chemist Gilbert N. Lewis in 1916. In a Lewis structure, the chemical symbol of each atom is surrounded by a set of dots, representing the valence electrons of the atom.
These dots are arranged to indicate the sharing or transfer of electrons between atoms, and the resulting arrangement of atoms and electrons is shown as a molecular structure.
Lewis structures are useful for predicting the shape, polarity, and reactivity of molecules and for understanding the principles of chemical bonding.
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A snorkeler takes a syringe filled with 17 mL of air from the surface, where the pressure is 1.0 atm, to an unknown depth. The volume of the air in the syringe at this depth is 7.9 mL. What is the pressure at this depth?
Express your answer to two significant figures.
_______________________________
So in short:. Original pressure (at surface) = 1.0 atm Original volume = 17 mLNew volume (at depth) = 7.9 mLUsing Boyle's Law, calculate new pressure:New pressure = (1.0 atm x 17 mL) / 7.9 mL = 2.2 atm two significant figures = 220 kPaHow many lone pairs of electrons are in the ion OH⁻?
0
1
3
6
There are 1 lone pairs of electrons are in the ion OH⁻
An OH ion has how many lone pairs?Since oxygen creates two bonds, we know that two electrons are required to create those two bonds. There are now just two electron pairs remaining that are not involved in bonding. Oxygen thus contains two lone pairs.
Is there a single pair of electrons in OH?The O and H atoms are connected by a solitary covalent link. The oxygen atom has a net -1 charge, which normally manifests as the whole charge on the OH- ion. On the O atom in the OH- Lewis structure, there exist lone electron pairs.
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Identify the differences in composition properties
Answer:
The composition and properties of a substance are different from each other.
The composition of a substance is what he substance is made of.
Let's take water as an example. We know that the chemical formula for water is . This tells us that water has 2 hydrogen molecules and 1 oxygen molecule. That is the composition of water.
The properties of a substance are how a substance appears and behaves both chemically and physically.
Again, let's use water as an example. Most times, water is a clear liquid. It freezes at 0 degrees Celsius and boils at 100 degrees Celsius. These are some of water's physical properties. Water also has many chemical properties; however, we needn't go into those.
Explanation:
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is a pH an atom, ion, molecule, macromolecule, or a cell?
Although there is some variation amongst tissues, the physiologically typical intracellular pH ranges from 7.0 to 7.4. Skeletal muscle in mammals typically has a pHi of 6.8 to 7.1.
A cell is it an atom?A cell is the basic membrane-bound living thing and can either have one or more cells. All the molecules required for an organism to function are found in cells. An atomic is 10-10m in size. In contrast, a cellular is 10-6 metres in size. Because all cells are composed of atoms, they are therefore bigger than atoms.
What keeps a cell's pH stable?Acid excretion, efflux through plasma membranes, and buffering mechanisms all work together to precisely preserve the pH of body fluids. Protons are extruded from the cytosol into the extracellular space through the organic cation transporter (MCT) and the Na+/H+ exchanger (NHE).
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7. How many total atoms are present on the reactant side of the equation?
A. 3
B. 6
C. 7
D. 13
There are 6 atoms of oxygen present on the reactants side of the given reaction. Thus the correct answer is option B.
How do you calculate the total atoms present on the reactant side?Firstly, let us write the accurate chemical equation and then subsequently we will balance it as and when needed.
4Fe+3O₂→2Fe₂O₃
This is the correct balanced chemical equation for the reaction. And as we can find that the amount of iron and oxygen atoms on the reactants side is equivalent to that of the products side. This corroborates that the given chemical equation is correctly balanced.
Now, the query is based on counting the total number of oxygen atoms present on the side of reactants. As we can clearly see on the reactant side there are three Oxygen molecules that are present. That means that there are a total of six oxygen atoms, since 3*2 gives us a total of 6 oxygen atoms.
Hence, there are a sum total of six O₂ atoms that are present on the reactant side of the provided chemical equation.
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The full question is:
How many oxygen atoms are present on the reactant side of the chemical equation 4Fe+3O₂→2Fe₂O₃?
A. 3
B. 6
C. 7
D. 13
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What is the molar solubility, S, of AgC, H; 02 if Ksp = 2.00 × 10-3?
The molar solubility of AgC, H; 02 is 0.0447 mol/L..
What is Molar Solubility?
Molar solubility refers to the maximum amount of a solute that can dissolve in a given amount of solvent at a particular temperature to form a saturated solution, usually expressed in moles per liter (mol/L or M). It is a measure of the solubility of a compound under specific conditions, such as temperature and pressure.
Molar solubility is an important parameter in chemistry and is often used to describe the solubility behavior of ionic compounds, salts, and other substances in various solvents.
Ksp = [tex]S^{2}[/tex]
Substituting the given value of Ksp, we get:
2.00 × [tex]10^{-3}[/tex] =[tex]S^{2}[/tex]
Taking the square root of both sides, we get:
S = √(2.00 × [tex]10^{-3}[/tex])
S = 0.0447 mol/L (rounded to four significant figures)
Therefore, the molar solubility of AgC, H; 02 is 0.0447 mol/L.
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0.0447 mol/L is the molar solubility, S, of AgC, H; 02 if Ksp = 2.00 × 10-3
Explain equilibrium constant.
A dynamic chemical system approaches chemical equilibrium when enough time has passed and its composition no longer exhibits any discernible propensity to change further. The equilibrium constant of a chemical reaction is the value of its reaction quotient at chemical equilibrium.
The maximum number of moles of a solute that can be dissolved in a liter of solution before the solution becomes saturated is its molar solubility. Because of the relationship between the molar solubility and the solubility product, one can use the other to determine the other.
Ksp = S^2
2.00 ×10^-3 = S^2
S = √(2.00 × )
S = 0.0447 mol/L
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Calculate to what temperature 75.0 grams of carbon tetrachloride gas, CCl4 would need to be heated to have a volume of 2.00 liters at 250 °C.
(Ideal Gas Law Problem)
Answer:
The CCl4 gas would need to be heated to -178.7 °C to have a volume of 2.00 liters at 250 °C.
Step-by-step explanation:
First, we need to calculate the number of moles of CCl4:
[tex]\sf:\implies n = \dfrac{m}{M}[/tex]
[tex]\sf:\implies n = \dfrac{75.0\: g}{154.0\: g/mol}[/tex]
[tex]\sf:\implies n = 0.487\: moles[/tex]
Next, we can use the ideal gas law to solve for the temperature:
[tex]\sf\qquad\dashrightarrow PV = nRT[/tex]
where:
P is the pressureV is the volumen is the number of molesR is the gas constant (0.08206 L·atm/mol·K)T is the temperature in KelvinWe need to convert the given temperature of 250 °C to Kelvin:
[tex]\sf:\implies T = 250 ^{\circ}C + 273.15[/tex]
[tex]\sf:\implies T = 523.15\: K[/tex]
Now we can plug in the values and solve for T:
[tex]\sf:\implies (1\: atm)(2.00\: L) = (0.487\: mol)(0.08206\: L\cdot atm/mol\cdot K)T[/tex]
[tex]\sf:\implies T = \dfrac{(1\: atm)(2.00\: L)}{(0.487\: mol)(0.08206\: L\cdot atm/mol\cdot K)}[/tex]
[tex]\sf:\implies T = 94.5\: K[/tex]
Finally, we need to convert the temperature back to Celsius:
[tex]\sf:\implies T = 94.5\: K - 273.15[/tex]
[tex]\sf:\implies \boxed{\bold{\:\:T = -178.7 ^{\circ}C\:\:}}\:\:\:\green{\checkmark}[/tex]
Therefore, the CCl4 gas would need to be heated to -178.7 °C to have a volume of 2.00 liters at 250 °C.
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Aniyah has a special type of paper that can permanently change color, she wonders whether light can cause the paper”s color to change. The table below shows what happens when different types of light hit the paper
The color of the paper may change as a result of the UV light.
Yes, that is conceivable if the table you are referring to shows that ultraviolet (UV) radiation can cause the paper to change colour.
Compared to visible light, UV light is more energetic and has shorter wavelengths. The molecules of the paper may experience a chemical reaction as a result of this high-energy radiation, changing the colour of the paper.
The term "photochemical reaction" or "photochemistry" refers to this process. The molecules of the paper are affected by UV radiation, which can result in chemical reactions that create new compounds with various colours.
For instance, some dyes have chemical connections that are UV-sensitive. These connections may rupture in the presence of UV radiation, changing the dye's colour.
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2. For the following reaction, what volume of 1.8M Na2CO3 is needed to react with 10.0L of 0.30M of
AICI3
what would go in the red square?
0.86 moles of [tex]N_2[/tex] and 1.72 moles of Li will react.
Calculation-We must place a 3 coefficient in front of Li in order to bring the equation into balance:
[tex]N_2 + 2Li = 2Li_3N[/tex]
The balanced equation demonstrates that 2 moles of Li and 1 mole of N2 react to create 2 moles of Li3N. Therefore, we can apply the following dimensional analysis to determine how many moles of Li will react with 0.86 moles of N2:
[tex]0.86 mol N_2 x (2 mol Li / 1 mol N_2) = 1.72 mol Li[/tex]
What is an equation, in your opinion?A declaration that two expressions with variables or integers are equal. In essence, equations are questions and attempts to systematically identify the solutions to these questions have been the driving forces behind the creation of mathematics.
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What is the mass of a 0.230 mole sample of potassium metal?
Answer:
Explanation:
0.25 moles KCl = 19g KCl (molar mass KCl = 74.6g)
.A) Calculate the molecular formula of a compound with an empirical formula of P2O5 and a molar mass of 283.88 g/mol.
B) Calculate the empirical formula of a compound containing 52.14% carbon, 13.12% hydrogen, and 34.73% oxygen.
A) The molecular formula is: P₄O₁₀; B) This gives us the empirical formula: C₂H₆O
What is empirical formula?The simplest whole number ratio of atoms in a compound is called the empirical formula.
A) Empirical formula mass of P₂O₅ = 2(atomic mass of P) + 5(atomic mass of O)
= 2(30.97 g/mol) + 5(15.99 g/mol)
= 141.94 g/mol
Molecular mass / Empirical formula mass = 283.88 g/mol / 141.94 g/mol = 2
This tells us that the molecular formula is twice the empirical formula, so the molecular formula is: P₄O₁₀
B) moles of C = 52.14 g / 12.01 g/mol = 4.344 mol
moles of H = 13.12 g / 1.01 g/mol = 12.97 mol
moles of O = 34.73 g / 16.00 g/mol = 2.17 mol
4.344 mol / 2.17 mol = 2.00
12.97 mol / 2.17 mol = 6.00
2.17 mol / 2.17 mol = 1.00
This gives us the empirical formula: C₂H₆O
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How many moles exist in 6.035 x 10^25 atoms of boron?
Please help
To determine the number of moles of boron in 6.035 x 10^25 atoms of boron, we need to use Avogadro's number, which is 6.022 x 10^23 particles per mole. We can set up a proportion to solve for the number of moles:
(6.035 x 10^25 atoms) / (6.022 x 10^23 atoms/mol) = x moles
Simplifying the expression on the left side, we get:
x = (6.035 / 6.022) x (10^25 / 10^23) moles
x = 1.002 moles
Therefore, there are 1.002 moles of boron in 6.035 x 10^25 atoms of boron.
How much dry solute would you take to prepare 118 mL of 0.105 M NaNO3
The amount of dry solute it would take to prepare 118 mL of 0.105 M NaNO3 is 1.05g.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass as follows:
mass = no of moles × molar mass
However, the number of moles it took to prepare 118 mL of 0.105 M NaNO3 must be calculated as follows;
no of moles = 0.105 × 0.118 = 0.0124 moles
molar mass of sodium nitrate = 85g/mol
mass = 85g/mol × 0.0124 moles = 1.05g
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2-10 someone do this for me correct answer only
Sulfur tetrafluoride, xenon tetrafluoride, antimony pentafluoride, ammonia, sulfur dioxide, water, carbon disulfide, 1,1-dichloroethane, arsenic trichloride
Methane with sulphur tetrafluoride has what shape?Sulfur tetrafluoride has a see-saw structure and a single pair of electrons. Methane has a tetrahedral structure and no lone pairs of electrons. Xenon tetrafluoride contains two lone pairs of electrons and a square planar structure.
What is a tetrahedral and square planar example?All eight of the d-electrons in the molecule Tetrachloropalladate(2-) are coupled in the lower-energy orbitals, which suggests a square planar geometry. This molecule is diamagnetic. Tetrachloronickelate, on the other hand, contains two unpaired electrons and is also d8, suggesting that it possesses a tetrahedral geometry.
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The density of helium in a balloon is 1.18 g/L. If a balloon holds 2.93 L of He, how many atoms of He are in
the balloon?
Answer: (a) 8.33x10^24.
Explanation: In the realm of gas thermodynamics, the variables P, V, n, R, and T denote pressure, volume, number of moles of gas, gas constant, and temperature in Kelvin, respectively.
It is feasible to manipulate this equation for the purpose of deducing n, which denotes the quantity of moles of gas.
The equation n = (PV) / (RT) represents the number of moles present in a gas system, where P, V, R, and T denote the pressure, volume, ideal gas constant, and temperature, respectively. This formula serves as a fundamental expression in thermodynamics and is employed in various fields of science, notably chemistry and physics, as a means of determining the amount of substance in a gaseous system. Its rigorous derivation and application have been extensively studied in the academic realm, and it remains a pivotal concept in modern scientific research.
Ascertaining the quantity of helium atoms contained within the balloon necessitates the conversion of the amount of helium moles into a corresponding number of helium atoms. The quantity of atoms in a single mole of any given substance, as denoted by Avogadro's number, is 6.022 x 10^23.
Initially, it is necessary to determine the quantity of moles of helium present within the spherical object.
The quantity n is expressed as the ratio of the product of the pressure and volume, PV, to the product of the universal gas constant, R, the temperature, T, and is mathematically represented as n = (PV) / (RT). Upon substituting the relevant values in this equation, where the pressure is not explicitly given, n may be calculated as (1.18 g/L x 2.93 L) / (0.0821 L-atm/mol-K x 273 K).
The quantity of substance present is 0.1386 mol.
Subsequently, the subsequent step would be to transform the aforementioned measurement into the numerical value representing the quantity of helium atoms present.
The numerical value of helium atoms can be expressed as the product of a constant factor 'n' and the Avogadro constant. That is, the number of atoms of helium is determined by multiplying 'n' with Avogadro's number.
The quantity of helium atoms is equivalent to 0.1386 moles, multiplied by the constant Avogadro's number of 6.022 x 10^23 atoms per mole.
The quantity of helium atoms is 8.33 x 10^23.
To calculate the number of atoms of helium in the balloon, we can use Avogadro's number and the molar mass of helium.
Explanation:The number of atoms of helium in the balloon can be calculated using the Avogadro's number and the molar mass of helium. The molar mass of helium is 4.0026 g/mol. First, we need to calculate the number of moles of helium in the balloon by dividing the mass of helium by its molar mass:
Number of moles of helium = Mass of helium / Molar mass of helium
Once we have the number of moles, we can use Avogadro's number to calculate the number of atoms:
Number of atoms of helium = Number of moles of helium * Avogadro's number
Let's substitute the values into the formula to find the number of atoms of helium in the balloon:
Number of atoms of helium = (1.18 g/L * 2.93 L) / (4.0026 g/mol) * (6.022 x 10^23 atoms/mol)
Solving this equation will give us the number of atoms of helium in the balloon.
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2Ca+1O2 -> 2CaO
How many grams of calcium is used in this reaction, if 15.0g calcium oxide are produced
Using the following equation:
4NH3 +502 --> 4NO + 6H₂O
How many grams of oxygen gas (0₂) are needed to react with 85 grams of ammonia
(NH3)?
Answer: 199.68 grams of oxygen gas (O2) are needed to react with 85 grams of ammonia (NH3).
Explanation: The equilibrium chemical equation is as follows:
The chemical equation expressed as 4NH3 + 5O2 → 4NO + 6H2O is a representation of a chemical reaction that describes the reaction between four molecules of ammonia and five molecules of oxygen to yield four molecules of nitrogen monoxide and six molecules of water.
The stoichiometric analysis indicates that the reaction between oxygen and ammonia necessitates five moles of the former to react with four moles of the latter.
The present ratio can be employed for the computation of the requisite quantity of O2 necessary for the reaction with 85 grams of NH3, in the ensuing manner:
Determine the quantity of moles of NH3.
The molar mass of ammonia (NH3) can be calculated by adding the atomic masses of its constituent elements. The atomic mass of nitrogen (N) is 14.01 g/mol, and the atomic mass of hydrogen (H) is 1.01 g/mol. Therefore, the molar mass of NH3 is determined by adding the atomic mass of N to three times the atomic mass of H. Mathematically, the molar mass of NH3 is expressed as 14.01 g/mol + 3(1.01 g/mol), which yields a value of 17.04 g/mol.
The quantity of NH3 in moles can be determined by dividing the mass of NH3 by its corresponding molar mass, according to the fundamental principle of stoichiometry.
The number of moles of NH3 can be determined as 85 grams divided by the molar mass of NH3, which is 17.04 grams per mole.
The calculated value of the quantity represented by "moles of NH3" has been determined to be 4.99 mol, with insignificance beyond two decimal places due to rounding.
Determine the quantity of moles of O2 necessary.
The number of moles of O2 present is equivalent to five-fourths of the moles of NH3.
The amount of oxygen, represented by the unit of moles, can be mathematically expressed as (5/4) multiplied by 4.99 mol.
The quantity of oxygen, expressed in terms of moles, corresponds to 6.24 mol.
The conversion of moles of O2 to grams can be made by utilizing the molar mass of O2, which is 32 g/mol. This entails multiplying the given number of moles by the molar mass in order to obtain the corresponding mass in grams.
The molar mass of O2 was determined to be 32.00 g/mol, which was derived by multiplying 2 with the molar mass of oxygen, 16.00 g/mol.
The computation of the mass of O2 is achieved by multiplying the number of moles of O2 by the molar mass of O2.
The expression denoting the quantity of molecular oxygen, where mass is represented as a product of 6.24 moles and a molecular weight of 32.00 grams per mole, can be expressed in a manner consistent with academic writing.
The mass of O2 is 199.68 g.