The atomic number of the resulting nuclide after both processes is Z+1
Define atomic number.
The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number (symbol Z).
Three fundamental processes, including the emission of alpha particles, beta rays, and ayos range, are involved in radioactive decay.
An rise in the atomic number of a unit is implied by the emission of a beta ray, which signifies the transition of a neutral into a proton.
Z ----> Z +1
Since the two particles' masses are nearly equal, the atomic mass remains constant, hence an antineutrino must also be released to counteract the reaction.
When the daughter particle emits a gamma ray, it transitions from its execrated state to its base state without changing its atomic mass or number.
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Which of the following compounds is NOT ionic?
O CaCl₂
O CO₂
O (NH4)20
O Nal
Among the given compounds, CO₂ is a compound that is not ionic.
In this question, we have been given four compounds - CaCl₂, CO₂, (NH₄)₂O, and NaI and among these four compounds, we have to tell which compound is not ionic.
A compound can be ionic or covalent. And the compound which is not ionic is also called a covalent compound.
So let us comment on each compound one by one.
CaCl₂ - It is an ionic compound because it is a compound formed between a metal and a non-metal. As a general rule, any compound formed between a metal and a nonmetal is called an ionic compound and a compound between a nonmetal and a nonmetal is called a covalent compound.
(NH₄)₂O - Though this is a compound containing no metallic element, it is still an ionic compound. NH₄⁺ is an ion, though still a nonmetal. We should remember that NH₄ compounds are exceptions to this rule. All compounds of NH₄ are actually ionic. Hence (NH₄)₂O is an ionic compound.
NaI - It is again a compound made of a metal and a nonmetal. Hence, according to the rule stated above, it is an ionic compound.
CO₂ - It is a compound made of a nonmetal and a nonmetal. Therefore, it is a covalent compound
Hence, among the above-given compounds, CO₂ is a covalent compound.
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does a reaction occur when aqueous solutions of silver(i) acetate and ammonium carbonate are combined?
No, reaction does not occur when aqueous solutions of silver(i) acetate and ammonium carbonate are combined.
What is an aqueous solution?
Aqueous solutions are made up of water and one or more dissolved materials. Solids, gases, or other liquids can all dissolve in an aqueous solution.
Silver (I) acetate has moderate solubility in water, hence it it does not form precipitate on mixing with ammonium acetate.
Therefore, reaction does not occur when aqueous solutions of silver(i) acetate and ammonium carbonate are combined.
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aromatic protons produce signal(s) in the range of 7-8 ppm, as a result of an effect called .
Due to a phenomenon known as diamagnetic anisotropy, aromatic protons emit signal(s) in the range of 7-8 ppm.
In aromatic compounds with resonance in the 7–8 ppm range, this impact is more prominent. A ring current is the term for the movement of the p electrons in benzene, and it induces an extra magnetic field that helps the protons. While the signals attributable to its aromatic carbons were seen in the range from 128 to 133 ppm, those for the aromatic phthalate ring protons were seen in the range from 7.63 to 7.82 ppm. ... the cis/trans-cyclohexylene CH carbon signals were detected in the range of 70.8 to 72.3 ppm.
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when 36.8 l of carbon monoxide reascvts with 4.9 l of oxygen gas at stp, what is the quantity of heat released to the surroundings
The amount of heat released is 105.41 kJ which is calculated by determining the limiting reactant.
The complete chemical reaction is:
2CO(g)+O2(g)---> 2CO2(g)
Volume of CO= 36.8 L
Mole of CO= 1/22.4 Lx 36.8 L=1.6428 moles
Volume of O2= 4.9 L
Mole of O2=1/22.4 Lx 4.9 L=0.2187 moles
The formation of products is dependent on the number of reactants. The reactant that is consumed first is known as the limiting reactant, when this reactant is consumed completely, then there will be no more formation of products.
The limiting reactant is found out by dividing with stoichiometry coefficients.
CO= 1.6428/2=0.8214
O2=0.2187/1=0.2187
Therefore, the limiting reactant is O2.
If 1 moles of O2 produce 482 kJ heat.
Then, 0.2187 of O2 will produce 4.82x0.2187=105.41 kJ heat.
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will t-pentyl chloride (2-chloro-2-methylbutane) float on the surface of water? look up its density in a handbook.
T-Pentyl Chloride has a density of.8420 g/mL. T-pentyl chloride will float because it has a lower density than water, which has a density of 1.0 g/mL.
Since 2 chloro 2 methyl butane has a lower density than water, it cannot dissolve in water, leading to the formation of organic layers.The solvent 2-Chloro-2-methylbutane is used to synthesize pentane as well as other chemicals. It serves as a catalyst and a petrochemical additive when employed in organic synthesis. Originally, this Alfa Aesar product was sold under the Thermo Scientific name. The heritage brand may be mentioned in some documents and label information. On the basis of quantum chemical calculations, exact estimates of the (IR) spectra for 2-Chloro-2-methylbutane have been made and are available for purchase.
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1. When NaCl are diolved in water, the freezing point i found to be - 0. 26°C. What i the omolarity for thi olution?
The K for water i 1. 86
The freezing point of water after NaCl has been dissolved in it is determined to be - 0.26°C. This solution has a 0.02 mol molarity.
The molality is the proportion of solute, in your case sodium chloride, NaCl, to solvent, in this case water, expressed as the number of moles per kilogram.
Utilizing the substance's molar mass will allow you to determine how many moles of sodium chloride are present in the sample. 25g = 1 mole of NaCl; 58.44g = 0.42 moles of NaCl
You then understand that you are dissolving many moles of sodium chloride in 20 kg of water.
To determine how many moles of solute are present in 1 kilogram of water, utilize the composition of this solution.
0.428 moles of NaCl per kilogram of water. 20 kg water
= 0.0214 moles of sodium chloride
= 0.02 mol
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what is the wavelength in nm of the photon emitted when the electron in the h atom drops from n 3 to the n 2 energy level?
Wavelength is the space among equal points (adjoining crests) withinside the adjoining cycles of a waveform sign propagated in area or alongside a wire. The wavelength is 656nm for the hydrogen.
In the photon electricity is inversely proportional to the wavelength of the electromagnetic wave. The shorter the wavelength, the greater lively is the photon, the longer the wavelength, the much less lively is the photon. Photons may be created and destroyed whilst maintaining electricity and momentum.
1/lambda = 109678(0.139) = 15233c * m ^ - 11/lambda = 109678(1/(2 ^ 2) - 1/(3 ^ 2)) 1/lambda = 109678(1/(n_ ^ 2) - 1/(n_ ^ 2))lambda = 6.56 * 10 ^ - 5 * cm = 656nm Hence, the wavelength of the emitted radiation is 656nm.Read more about photon:
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arrange the following isoelectronic series in order of decreasing radius: na+, o2−, f−, al3+, mg2+.
Isoelectronic sequence, from smallest to largest radius: Na+, O2, F, Al3+, Mg2+. The ionic radii of isoelectronic species increase as the magnitudes of nuclear charge decrease.
'what is ionic radii?'
The ionic radius is the distance from an ions nucleus that it can influence its electron cloud.
Ions are produced when an atom gets or loses electrons. When an electron is lost, an atom becomes a cation, and when an electron is acquired, an anion. The ionic radius is the distance between an ion's nucleus and its outermost shell.
The atomic size of a cation will be less than that of its parent atom. An ion's size is often larger than that of its parent atom.
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The property of matter that allows us to determine the volume of an object by water
Displacement is
The property of matter that allows us to determine the volume of an object by water is Density.
Displacement is described as a vector whose length is the shortest distance from the initial to the final position of a point P undergoing motion.
What is density?Density is described as the substance's mass per unit of volume which is a standard mechanical quantity.
The Archimedes' principle is very useful tool for calculating the volume of an object that does not have a regular shape wherein the oddly shaped object can be submerged, and the volume of the fluid displaced is equal to the volume of the object.
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calculate the amount of heat transferred when 31.86 g of ch3oh is decomposed by this reaction at constant pressure.
This reaction decomposes 31.86 g of ch3oh at constant pressure, transferring 250 KJ of heat, as stated below.
The front and rear regions together make up the genuine contact area, and the contact pressure is the ratio of the typical load to this total. Only in the case of plastic contact may it be referred to as the scratch hardness.
Think about the following response:
2CH3OH(g)→2CH4(g)+O2(g)ΔH=+252.8kJ
Determine the amount of heat that is transmitted when this reaction, which occurs at constant pressure, breaks down 31.860g of CH3OH(g).
31.86 g CH3OH(g) (1 mol/ 32.05 g) = 0.99 mol CH3OH(g) +252.8 kJ
Q = 0.99 mol (252.8 kJ) = 250 kJ
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Identical forces act for the same length of time on two different object. The change in momentum of the smaller object is
A) smaller than the change in momentum of the larger mass, but not zero.
B) zero.
C) equal to the change in momentum of the larger mass.
D) larger than the change in momentum of the larger mass.
The change in momentum of the smaller object is smaller than the change in momentum of the larger mass, but not zero.
What is momentum in force?In most cases, momentum is the quantity that describes the internal motion of any moving object. Force, on the other hand, is the quantity that modifies the rate is taken existing when applied to any object. Momentum is the sum of motion contained within a moving item.
Why is momentum necessary?Since there are no outside forces in an external observer (like the universe), momentum is always preserved. The components of momentum in any directions will also be maintained because momentum is conserved. When solving collision-related issues, the principle of momentum conservation is crucial.
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Polonium crystallizes with a simple cubic structure. It has a density of 9.3 g/cm^3, a radius of 167 pm, and a molar mass of 209 g/mol. Use these data to estimate Avogadro's number (the number of atoms in one mole).
Simple cubic crystals of polonium form when it is heated. The answer to the question is 6.02*10²³Avogadro's number.
What is the purpose of polonium?Polonium is employed in research and surface coatings devices because it is an alpha-emitter. It serves as a dominant male source with in shape of a thin layer on a stainless disc. It is employed to get rid of static electricity generated during operations like rolling wire, papers, and sheet metal.
Briefing:The edge length for a simple cubic is as follows:
a = 2r
Here r is the radius of the atom.
Volume of unit cell = a³
Here ‘a’ is the lattice parameter (edge length).
Density(g/m³) = Mass(m)/Volume(m³)
Mole:
No. of moles = mass in gram/molar mass in g/mol
The atomic number present for every site (muscle, eyes, edges, and so on) and the proportion of atoms here on relevant sites in a crystalline lattice determine the quantity of elements per unit cell.
The input per atom for bcc is 1.
The contribution of one atom in face-centered is 1/2.
The value of such an atom is 1/4 for edge-centered.
Their ratio is 1/8 for the atoms in the corners.
The formula, which may be used to determine the number of atoms,
No. of atoms = no. of moles (mol) * Avogadro no. ([tex]N_{A}[/tex])
From this expression Avogadro number can be calculated.
Step: 1
Considering that polonium crystals have an atomic radius of
r = 167pm
The side length of a basic cubic unit cell is equal to twice the radius.
Edge length,a = 2r
= 2*167pm
= 2*167*10⁻¹² m
= 3.34*10⁻⁸ cm
Volume of unit cell,
Volume = a³
= (3.34*10⁻⁸cm)³
= 3.72*10⁻²³ cm³
The mass of unit cell is then calculated:
Mass (g) = Density (g/cm³) * Volume (cm³)
= 3.46*10⁻²²g
Thus the mass of polonium is calculated to be
3.46*10⁻²²g
The polonium crystal's atomic radius is provided. The edge length may be estimated from that. When the density of a provides a valuable crystal is known, the volume can be computed first from side lengths, and the mass is discovered to be 3.46*10⁻²²g.
Calculate the Avogadro number.
Step: 2
Given that polonium has a molar mass of 209g/mol
It is determined how many moles of polonium there are:
The mass of polonium is 3.46*10⁻²²g
number of moles of polonium = mass in g/molar mass in g/mol
=3.46*10⁻²²g/209g/mol
= 1.66*10⁻²⁴
One polonium atom (1/8*8) makes up one unit cell.
One approach to determining the Avogadro number is as follows:
Avogadro number = No. of polonium atoms/No. of moles of polonium atoms
= 1/1.66*10⁻²⁴ mol
= 6.02*10²³
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A _ push would mean _ magnitude of force and vice versa _ push would mean a _ magnitude
PLEASE HELP FILL IN THE BLANKS!
A strong push would mean a large magnitude of force and vice versa a weak push would mean a small magnitude.
a 7.5 l mixture of gases is produced by mixing 4.0 l of n2 at 450 torr, 3.5 l of 02 at 252 torr, and 0.21 l of c02 at 150 torr. if the temperature is held constant at 65 0 c, what is the total pressure of the mixture?
The total pressure of the mixture is 359.5 torr, that is calculated by using ideal gas equation.
Volume of N2, V1=4.0 L
Pressure of N2, P1=450 Torr=450/760 atm
Thus, number of moles of N2, n1= P1V1/RT
=(450/760)*4/0.082*338
=0.085 mol
Similarly,
Volume of O2, V2=3.5 L
Pressure of O2, P2=252 Torr=252/760 atm
Thus, number of moles of O2, n2= P2V2/RT
=(252/760)*3.5/0.082*338
=0.042 mol
Similarly,
Volume of CO2, V3=0.21 L
Pressure of CO2, P3=150 Torr=150/760 atm
Thus, number of moles of CO2, n3= P3V3/RT
=(2150/760)*30.21/0.082*338
=0.001 mol
Total number of moles = n1+n2+n3
=(0.085+0.042+0.21)
=0.128 mol
Total volume, V=7.5 L
Using, ideal gas law
Thus, total pressure, P=nRT/V
=0.128*0.082*338/7.5 atm
=0.473 atm
=0.473*760
=359.5 torr
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the half-life of cesium-137 is 30 years. suppose we have a 70-mg sample. (a) find the mass that remains after t years.
70/ 2(t/30) mg is the mass that remains after t years, the half-life of cesium-137 is 30 years. suppose we have a 70-mg sample.
Now we have to calculate the mass that remains after 't' years.
As we are given that,
a o= 70 mg
t 1/2= 30 years
Now put all the given values in formula , we get:
a=a0/2(t/t/2)
a= 70/2(t/30) mg
The delicate, golden-colored metal caesium is immediately attacked by air and reacts violently with water. As a drilling fluid, caesium compounds are most frequently used. Additionally, they are employed to produce special optical glass, as a catalytic promoter, in vacuum tubes, and radiation detection apparatus. The universal time standard is also a result of cesium isotopes. Because of this, they are utilised in atomic clocks for cell phone networks, the internet, GPS, and aviation guiding systems.
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When 34.5 g of KClO3 decompose, how many grams of oxygen are produced?
(answer before Dec 12 preferred- )
Answer:
52.25 grams of oxygen are produced.
Explanation:
When 34.5 g of potassium chlorate (KClO3) decomposes, it produces oxygen gas according to the following chemical equation:
2 KClO3 -> 2 KCl + 3 O2
This means that for every 2 grams of potassium chlorate that decomposes, 3 grams of oxygen gas are produced. In the case of 34.5 grams of potassium chlorate, this would produce 3 * 34.5/2 = 52.25 grams of oxygen. Therefore, when 34.5 g of KClO3 decomposes, 52.25 grams of oxygen are produced.
PLEASE HELP I AM SO BEHIND ON SCHOOLWORK AND I HAVE TO GET IT ALL DONE BY FRIDAY!!
Which physical adaptation increases an organism’s chances of finding a suitable habitat?
Responses
the long legs of wading birds
the venom of snakes
the croak of frogs
the quills of a porcupine
Tin (II) oxide is placed into a bottle of hydrogen gas and a reaction occurs where metallic tin and water form:
Skeleton Equation:
Balanced Equation:
The skeleton equation of the reaction of Tin oxide and hydrogen:
[tex]SnO_2 + H_2\longrightarrow Sn + H_2O[/tex]
Balanced equation:
[tex]SnO_2 + 2H_2\longrightarrow Sn + 2H_2O[/tex]
What happened in the reaction of tin and water?Tin (Sn) can be defined as an unreactive metal. When tin dioxide and hydrogen gas react with each other, metallic tin and water are formed.
Sn is not very reactive in comparison with the other elements in its own group, it is more reactive than Ge, which lies just above it in the group. It is unaffected by water or air at room temperature. Sn is anti-corrosive and therefore applied as a coating to protect metals.
When tin dioxide (SnO₂) is placed into a bottle of hydrogen gas. The balanced chemical equation for the chemical reaction is as follows:
[tex]SnO_2 + 2H_2\longrightarrow Sn + 2H_2O[/tex]
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an acetate buffer has a ph of 4.40. which of the following changes will cause the ph to decrease?
The pH will decrease if more acid, such as a small amount of HCl, is added to the buffer system. To dissolve 246.1 g of sodium acetate, combine it with 500 mL of deionized water.
The pH can be increased to 5.2 by using glacial acetic acid. It is advisable to let the solution cool over night. You can increase the pH by one more point to 5.2 by using glacial acetic acid. By adding sodium from the conjugate base, a weak acid solution's pH can be raised. This makes sense because adding a base should increase the pH of a weak acid sodium solution, and sodium acetate is a basic.
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A factory uses nitric (V) acid and ammonia gas in the preparation ofa fertilizer. If the daily production of the fertilizer is 4800kg; calculate the mass of ammonia gas used in kg. N=14.0; 0= 16.0; H=1.0)
The mass of ammonia gas used in kg would be 1.02 kg..
Stoichiometric problemNitric (V) acid and ammonia gas react to form fertilizer according to the following balanced chemical equation:
[tex]HNO_3 + NH_3 -- > NH_4NO_3[/tex]
From the equation, the ratio of the ammonium nitrate produced to the ammonia gas used is 1:1.
The molar mass of [tex]NH_4NO_3[/tex] = 14 + 4 + 14 + 48 = 80 g/mol
Mole of 4800 kg [tex]NH_4NO_3[/tex] = 4800/80 = 60 mol
Thus, the equivalent amount of ammonia that needs to react will also be 60 mol.
Molar mass of amonnia = 14 + 3 = 17 g/mol
Mass of 60 mol ammonia = 60 x 17
= 1020 grams
1020 grams = 1020/1000
= 1.02 kg
In other words, the mass of ammonia gas used would be 1.02 kg.
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how many liters of a 0.2 m hcl solution are needed in order to have 1.0 moles of hcl?
It takes 5.0 litres of a 0.2 M HCl solution. In this instance, 5.0 litres of solution would yield 1.0 mole of HCl. For a 0.2N solution, 8.0 grammes of NaOH per litre of water would be needed.
To HCl achieve the most accurate preparation, make sure your powder is dry and limit its exposure to the air during usage, especially during storage. NaOH adsorbs mole water quickly (with heat generation). Therefore, you will need to weigh 10/5 = 2 g of pure NaOH to create 200 ml of 0.25 N. You must dissolve 40.00 g of sodium hydroxide pellets in 250 ml solution of distilled water to create 1MNaOH solution, and you must then dilute the solution to 1 litre.
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Please Research how the chemist John Dalton came up with his ideas about atoms and review how scientific ideas change with time.
Answer:
Experiments with gases that first became possible at the turn of the nineteenth century led John Dalton in 1803 to propose a modern theory of the atom based on the following assumptions. 1. Matter is made up of atoms that are indivisible and indestructible.
Express the morality of a solution that contains 0.5 mol of calcium acetate per 1.0 L of solution.
The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, the Molarity of a solution that contains 0.5 mol of calcium acetate per 1.0 L of solution is 0.5 M.
What is molarity?Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.
Mathematically,
Mathematically,
Molarity= number of moles of solute/volume of solution in litre
Where,
moles= 0.5 mol
Volume=1.0 L
Substituting values in above equation, we get
Molarity= 0.5 mol /1.0 L
=0.5 M
Therefore, the Molarity of a solution that contains 0.5 mol of calcium acetate per 1.0 L of solution is 0.5 M.
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D2O (deuterium oxide) has a self-ionization constant of 8.9 x 10-16 at 20 OC. Calculate [Dt] and [OD -] for neutral D2O at this temperature
The deuterium oxide) has a self-ionization constant of 8.9 x 10-16 at 20 OC. Calculate [Dt] and [OD -] for neutral D2O at this temperature is 2.98⋅10−8.
D.+]=[outer diameter − ]=2.98⋅10 −8 M.
step 1
1/2 K_w = 8.9 \cdot 10^{-16}Kw na =8.9⋅10 −16
Let's calculate [D^+][D].+] and [OD^-][OD−].
for pure deuterium oxide.
[D^+] = [OD^-][D +]=[outer diameter −] with this
\begin{align*} K_w &= [D^+] \cdot [OD^-]\\ [D^+] &= [OD^-] = \sqrt {K_w}\\ &= \sqrt {8.9 \ cdot 10^{-16}}\\ &= {\color{#4257b2}2.98 \cdot 10^{-8} \mathrm{M}} \end{align*}.
K.wna [D + ] na =[D+]⋅[OD −] =[outer diameter−]=K.w na na = 8.9⋅10 −16 na =2.98⋅10−8 M.na.
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Which formula represents a polysaccharide that consists of five monosaccharides joined together by dehydration synthesis? A C6H12O6 B. CaOH.C 5C6H12O6 D. C30H52O26
The formula for a polysaccharide that consists of five monosaccharides joined together by dehydration synthesis is D. C30H52O26.
Polysaccharides are complex carbohydrates made up of long chains of monosaccharides, or simple sugars, linked together by glycosidic bonds. Dehydration synthesis, also known as condensation, is a chemical reaction in which two molecules are joined together by the loss of a water molecule, resulting in the formation of a covalent bond.
The formula C30H52O26 represents a polysaccharide that consists of five monosaccharides with the formula C6H12O6, which is the formula for glucose. When monosaccharides are joined together through dehydration synthesis, the resulting polysaccharide has a formula that is a multiple of the monosaccharide formula. In this case, the polysaccharide consists of five monosaccharides, so its formula is 5 times the formula for a single monosaccharide, or 5 x C6H12O6 = C30H52O26.
A. C6H12O6 is the formula for a single monosaccharide, such as glucose.
B. CaOH.C is not a valid chemical formula.
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The formula for a polysaccharide that consists of five monosaccharides joined together by dehydration synthesis is D. C30H52O26.
Polysaccharides are complex carbohydrates made up of long chains of monosaccharides, or simple sugars, linked together by glycosidic bonds. Dehydration synthesis, also known as condensation, is a chemical reaction in which two molecules are joined together by the loss of a water molecule, resulting in the formation of a covalent bond.
The formula C30H52O26 represents a polysaccharide that consists of five monosaccharides with the formula C6H12O6, which is the formula for glucose. When monosaccharides are joined together through dehydration synthesis, the resulting polysaccharide has a formula that is a multiple of the monosaccharide formula. In this case, the polysaccharide consists of five monosaccharides, so its formula is 5 times the formula for a single monosaccharide, or 5 x C6H12O6 = C30H52O26.
A. C6H12O6 is the formula for a single monosaccharide, such as glucose.
B. CaOH.C is not a valid chemical formula.
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what type of bond will result if the atoms below combine? the electronegativity of each atom is given.
The type of bond that will result if the atom Cs and F combine will be an electrovalent bond or ionic bond.
Caesium belongs to Group 1 in the periodic table with an electronegativity of 0.79.
Group 1 elements are also known as alkali metals.
And the other compound which is mentioned in the question is Fluorine F. It belongs to the family of halogen with electronegativity of 4.0. Group 7 in the periodic table is halogen family.
As their is high electronegativity difference between group 1 metals and group 7 elements so ionic bond is formed between them
Therefore, Cs and F form Cs F via electrovalent bonding or ionic bonding with one another.
Your question is incomplete most probably your full question was
What type of bond will result if the atoms below combine? The electronegativity of each atom is given.
Cs0.79
F4.0
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FILL IN THE BLANK. Electrons in the 1s subshell are much closer to the nucleus in Ar than in He due to the larger ______ in Ar
Electrons in the 1s subshell are much closer to the nucleus in Argon than in Helium due to the larger in nuclear charge in Ar.
The energy of an electron in a multi-electron atom depends on both its principal quantum number (shell) and its azimuthal quantum number (subshell). In a given principal quantum number, the energies of the orbitals increase in the order s<p<d<f. But for higher energy levels there is a difference in the energies of the orbitals and it will not follow the above order.
Effective nuclear charge is the net charge experienced by an outer shell electron in an atom while nuclear charge is the total charge of the nucleus. While the effective nuclear charge is determined by considering the influence of the internal orbital electrons and the nuclear charge, the nuclear charge is independent of the electron charge in the atom. The effective nuclear charge depends not only on the number of protons in the nucleus while the nuclear charge depends only on the number of protons present in the nucleus.
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what mass of sodium sulfate is required to form 250. ml of a solution in which the concentration of sodium ions is 0.183 m? provide answer in grams to 3 significant figures.
The mass of sodium sulfate required to form 250mL of a solution in which the concentration of sodium ion is 0.183M is 6.53 grams.
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, according to this question, sodium sulfate is has a solution with volume 250mL with a concentration of sodium ions of 0.183M. The no of moles must first be calculated as follows:
moles = 0.183 × 0.250 = 0.046moles
Mass of sodium sulfate = 0.046 × 142.04 g/mol = 6.53 grams.
Therefore, 6.53 grams is the mass of the sodium sulfate solution.
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The mass of sodium sulfate required to form 250 mL of solution in which the concentration of sodium ions is 0.183 would be 3.25 grams.
Stoichiometric problemSodium sulfate is made up of sodium and sulfate ions according to the following equation:
[tex]Na_2SO_4 --- > 2Na^+ + SO_4^2^-[/tex]
From the equation above, a mole of sodium sulfate is made from 2 moles of sodium ions and 1 mole of sulfate ions.
Recall that: mole = molarity x volume
The mole of 0.183 M sodium ion in 250 mL os solution would be:
0.250 x 0.183 = 0.04575 mol
The equivalent mole of sodium sulfate would be:
0.04575/2 = 0.022875 mol
Recall that: mass = mole x molar mass
The molar mass of sodium sulfate is 142.04 g/mol
Mass of 0.022875 mol sodium sulfate = 0.022875 x 142.04
= 3.249165 grams
3.249165 grams to 3 significant figures = 3.25 grams.
Thus, the mass of sodium sulfate required would be 3.25 grams.
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If you left a cup of ice out on the countertop on a hot day, do you think your ice melts because of conduction, convection, or radiation? Explain your answer.
Answer: Should be conduction (for the explanation bit it's below)
technically its both conduction and convection but if its one answer only then conduction should be right
explain your answer bit:
I think it is conduction because the heat in the environment is being transferred into the ice, which is warming it up until it reaches thermal equilibrium and then eventually evaporates.
hope this helps!
considering each of the reactants are in a 1:1 ratio, how many grams of na2co3 are required to react with 0.0118 moles of cocl2.6h2o?
2.00 × 10⁻³ g grams of na2co3 are required to react with 0.0118 moles of cocl2.6h2o
Explanation:
Write the balanced decomposition reaction in step one.
2 NaHCO3 = Na2CO3, CO2, and H2O
Step 2: Determine the moles needed to equal 0.0118 g of Na2CO3.
Na2CO3 has a molar mass of 105.99 g/mol.
1.11 104 mol is equal to 0.0118 g 1 mol/105.99 g.
Step 3: Determine how many moles of H2O were created by using 1.11 104 moles of Na2CO3.
Na2CO3 and water have a molar ratio of 1:1. There are 1.11 x 104 moles of H2O created from 1 mole of water.
Step 4: Determine the mass equal to 1.11 104 moles of water.
H2O has a molar mass of 18.02 g/mol.
18.02 g/mol divided by 1.11 104 mol yields 2.00 103 g.
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