Answer:
NH3
Explanation:
In solution, they are in equilibrium. NH4+ acts as a bronsted Lowry acid and donates an H to become NH3, and NH3 acts as a bronsted lowry base and accepts an H. In this pair, NH3 is a weak base, which gets its basic character due to the presence of lone pair of nitrogen and its ability to donate it.
HELP ASAP
Below are descriptions of two different objects that begin at rest and then now forces acting on them as described below.
Object 1: A skateboard with unbalanced forces
Object 2: A bicycle with balanced forces
Which statement is true about the objects?
A:Both objects are moving.
B: Both objects are not moving.
C:Object 1 is moving, and Object 2 is not moving.
D:Object 1 is not moving, and Object 2 is moving.
Answer:
C: Object 1 is moving, and Object 2 is not moving
Explanation:
Object one has unbalanced forces, so it can cause it to start moving ,since one force is moving stronger than its opposing one, but since Object 2 has balanced forces both forces hold it in place.
A mixture of 0.0636 g of hydrogen and 0.0315 mol of oxygen in a closed container is sparked to initiate a reaction. How many grams of water can form
0.03154 mol H₂O is formed from 0.0636 g of hydrogen if we consider that O₂ is a limiting reagent.
The balanced equation is
[tex]2H_{2} (g)[/tex] + [tex]O_{2} (g)[/tex] → [tex]2H_{2} O (l)[/tex]
Here, we are calculating the moles [tex]H_{2}O (l)[/tex] from the moles of H₂ if we consider O₂ is a limiting reagent:
Given:
The mass of H₂ = 0.0636 g
We know that,
The moles of H₂ = (0.0636 g of H₂) × [tex]\frac{1.0 mol H_{2} }{2.016 g H_{2} }[/tex]
= 0.03154 mol H₂
Moles of H₂O (l) from H₂ = ( 0.03154 mol H₂) × [tex]\frac{2.0 mol of H_{2} O (l)}{2.O mol H_{2} }[/tex]
= 0.03154 mol H₂O
Therefore, 0.03154 mol H₂O is formed from 0.0636 g of hydrogen if we consider that O₂ is limiting reagent.
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Write the complete chemical formula for the unknown compound.
The complete chemical formula for the unknown compound will be [tex]C_2H_6[/tex]
Chemical formulaThe chemical formula of the compound is [tex]C_2H_x[/tex] and x is supposed to be a whole number.
In the analysis, C = 2.22 moles and H = 6.7 moles
Dividing both by the smallest: C = 1 and H = 3
Thus, the empirical formula of the compound will be [tex]CH_3[/tex]
But since the compound is [tex]C_2H_x[/tex], it means both C and H are multiplied by 2.
The chemical formula will, therefore, be [tex]C_2H_6[/tex]
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The radius of a hydrogen atom is 5.29 x 10-11m. What is the electric force between the single proton and the single electron of a hydrogen atom
The radius of a hydrogen atom is 5.29 × 10⁻¹¹ m. The electric force between the single proton and the single electron of a hydrogen atom is 7.94 × 10⁻⁸ N.
What is Coulomb's law ?[tex]F = \frac{1}{4 \pi \epsilon_{0}} \cdot \frac{q_1 q_2}{r^2}[/tex]
where,
F = Electric Force
k = Coulomb constant
r = distance of separation
Now,
[tex]F = \frac{1}{4 \pi \epsilon_{0}} \cdot \frac{q_1 q_2}{r^2}[/tex]
[tex]= \frac{1}{4 \pi \epsilon_{0}} \cdot \frac{e^2}{r^2}[/tex]
[tex]= \frac{1}{4 \pi\ 8.85 \times 10^{-12}} \cdot (\frac{1.6 \times 10^{-19}}{5.29 \times 10^{-11}})^{2}[/tex]
= 7.94 × 10⁻⁸ N
Thus from the above conclusion we can say that The radius of a hydrogen atom is 5.29 × 10⁻¹¹ m. The electric force between the single proton and the single electron of a hydrogen atom is 7.94 × 10⁻⁸ N.
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In a sample consisting of 2.50 g of methane (CH4), there are _____ x 1023 atoms present. Complete the number using standard scientific notation.
In a sample consisting of 2.50 g of methane (CH4), there are 4.5 × 10²³ atoms present.
How to calculate the number of mole ?To calculate the number of moles it is expressed as
Number of moles = [tex]\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
= [tex]\frac{2.50\ g}{16\ g/mol}[/tex]
= 0.15 mol
1 mole of methane contains 6.022 × 10²³ molecules
0.15 mole of methane will contain
= [tex]\frac{0.15 \times 6.022 \times 10^{23}}{1}[/tex]
= 0.9 × 10²³ molecules
= 0.9 × 10²³ × 5 atoms
= 4.5 × 10²³ atoms of methane
Thus from the above conclusion we can say that In a sample consisting of 2.50 g of methane (CH4), there are 4.5 × 10²³ atoms present.
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I need help with this ASAP pls
Answer:
2c 1s
Expination: it came by there are 2carbon and 1sulphur
Answer:
2c1s
Explanation:
2c1s make me brainlist
The manhattan project was responsible for the creation of _____. the atomic bomb the hydrogen bomb the first satellite the aswan dam
Which bomb was created as a part of the manhattan project?
The manhattan project was responsible for the creation of the atomic bomb.
What was the manhattan project?
The first nuclear weapons were created as a result of the Manhattan Project's research and development efforts during World War II. With the help of the United Kingdom and Canada, it was spearheaded by the United States. Major General Leslie Groves of the U.S. Army Corps of Engineers oversaw the project from 1942 to 1946. Robert Oppenheimer, a nuclear physicist, served as the lab's director and was responsible for the actual bomb's design, the atomic bomb.
As the Army's first headquarters were located in Manhattan, the project's Army component was given the moniker Manhattan District, gradually replacing the official codename for the entire project, Development of Substitute Materials. The project eventually absorbed Tube Alloys, its previous British counterpart. The Manhattan Project started out small in 1939, but it eventually employed over 130,000 people and cost close to US$2 billion (about $23 billion in 2020). Less than 10% of the cost went toward the design and production of the weapons, with more than 90% going toward the construction of factories and the production of fissile material. More than thirty locations in the United States, the United Kingdom, and Canada were used for research and production.
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500 cm3 of H2 gas at STP
Contradictions of hydrogen
Answer:
letter to your mother telling her about the celebrations of your birthday at school
Consider two gases, A and B, are in a container at room temperature. What effect will the following changes have on the rate of the reaction between these gases? The temperature is decreased at a constant volume.
Answer:
decrease in temperature , decreases the kinetic movements of the gase molecules as a result decreases the frequency of collisions between gas molecules A and B consequently decreases the rate of reactions of gases A and BThe electron configuration of an element is 1s22s22p¹. How many valence electrons does the element have
a) 1
b) 2
c)3
d)4
Answer:
[tex]\huge\boxed{\sf 3 \ electrons}[/tex]
Explanation:
Electronic configuration:[tex]1s^22s^22p^1[/tex]
The outermost/valence shell is the second one, seeing from the electronic configuration.
Valence electrons:= 2 + 1 = 3 (electrons are raised to the power in the electronic configuration)
Since, the valence shell here is 2, the electrons of second shell will be counted as valence electrons.
[tex]\rule[225]{225}{2}[/tex]
The diagram below shows the different phase transitions that occur in matter. Three bars are shown labeled Solid, Liquid, and Gas. They are connected by arrows labeled 1 to 6. Arrow 1 points from liquid to gas; arrow 2 from solid to liquid, arrow 3 from solid to gas, arrow 4 from gas to liquid, arrow 5 from liquid to solid, and arrow 6 from gas to solid. Which arrow would most likely represent the phase change that involves the same amount of energy as arrow 1? 2 3 4 5 Mark this and r
The arrow that will represent the phase change that involves the same amount of energy as arrow 1 will be arrow 4.
Phase changeArrow 1 represents a phase change from liquid to gas while arrow 4 represents a phase change from gas to liquid.
In other words, arrow 1 and arrow 4 are direct opposites of one another,
This means that if X amount of energy is required for arrow 1, the same amount of energy will be needed for arrow 4 but in the reverse direction.
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Answer:
The correct answer would be option C. 4!
Explanation:
Hope this helped confirm :)
I just got this question right on Edge :P
8. A 15.0 gram unknown piece of metal at 99 oC is added to 75 grams of water at 23 oC. The final temperature of the metal and water is 26 oC. What is the specific heat of the unknown metal? (Remember that the specific heat of water is 4.18 J/g* oC.)
The specific heat of the unknown metal is 0.859 J/g⁰C.
Specific heat of the unknown metal
Heat lost by the unknown metal = Heat gained by water
m₁c₁Δθ₁ = m₂c₂Δθ₂
where;
c₁ is specific heat of the unknown metalc₂ is specific heat of water(15)(c₁)(99 - 26) = (75)(4.18)(26 - 23)
1095c₁ = 940.5
c₁ = 940.5/1095
c₁ = 0.859 J/g⁰C
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What is a list of quantities of components, ingredients, and materials required to make a product?.
Answer:
The list of quantities of components, ingredients, and materials required to produce a product is the. master schedule.
8.Your protocol calls for working with a 1.5 x 10-4 M boric acid solution. To save shelf space, you decide to make up a 20X stock solution. What is the molarity of the stock solution you just made
The molarity of the stock solution is 7.5 * 10 ^- 6 M.
Molar attention is a measure of the awareness of a chemical species, especially of a solute in an answer, in terms of the quantity of substance consistent with the unit quantity of the answer. In chemistry, the maximum generally used unit for molarity is the range of moles according to liter, having the unit symbol mol/L or mol/dm³ in the SI unit.
Molarity (M) is the quantity of a substance in a positive volume of answer. Molarity is described because the moles of a solute in step with liters of an answer. Molarity is also called the molar awareness of a solution.
Molarity is defined as the range of moles of solute consistent with the liter of answer. Molality is described because of the number of moles of solute per kilogram of solvent. Normality is described as the variety of equivalents in line with the liter of answers.
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What's the difference between a sigma bond and pi (π) bond?
Also, please state the three types of hybridization.
Answer:
Sigma bonds are formed by the Head-to-head overlapping of atomic orbitals while Pi bonds are formed by the lateral overlapping of two atomic orbitals.Types of hybridization:1) sp hybridization.2) sp² hybridization.3) Sp^3 hybridization.Hope this helps.Good luck ✅.
How many grams of carbon are contained in one mole of C3H8?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles C3H8, or 44.09562 grams
In an endothermic reaction, what happens to the surroundings?
A. The bond energy is greater than 600 kJ.
B. The bond energy is less than 600 kJ.
C. The temperature increases.
D. The temperature decreases.
Answer: the temperature decreases
Explanation:
- An endothermic reaction absorbs heat which is taken from its immediate surroundings, causing the temperature to decrease
hope this helps :)
how do gas molecules move across a room
Answer:
It expands to its secluded area.
Explanation:
Any substance that is heated will have its molecules and atoms move more quickly, expanding the distance between them all. The term "expansion" is used more frequently to describe this growth in space. Heat causes all stuff, including solids, liquids, and gases, to expand.
In some cases, heating solids causes them to transform into liquids. However, they could revert to their solid state after cooling. Similar to this, certain liquids turn into gaseous states when heated. Instead of altering their condition, gases, on the other hand, frequently expand and raise the pressure inside a container.
Scientists typically blow up balloons to test the expansion of gases, exposing some to the light while leaving others at room temperature. It is demonstrated that heat causes gases to expand when balloons exposed to the sun grow in size while those at ambient temperature remain unchanged.
A teacher divides her class into groups and assigns each
group the task of measuring the mass of the same object
three times. The teacher already knows that the mass of
the object is 25 g.
Based on the results each group records, which group makes the most
precise measurements of the object?
O
A. Group C: 32.1 g, 35.0 g, 25.0 g
O
B. Group B: 25.5 g, 25.0 g, 24.8 g
O
C. Group A: 28.5g, 28.4 g, 28.5 g
O D. Group D: 20.0 g, 25.0 g, 30.09
Answer:
Group C
Explanation:
Precision is how close the values are to each other
What is the temperature of 0.460 mol of gas at a pressure of 1.2 atm and a volume of 12.5 L ? Express your answer using two significant figures.
The temperature is 370K.
The volume of a given fuel pattern is immediately proportional to its absolute temperature at regular pressure (Charles's law). The volume of a given amount of fuel is inversely proportional to its pressure whilst temperature is held steady (Boyle's regulation).
Density is immediately proportional to stress and indirectly proportional to temperature. As stress increases, with temperature constant, density will increase. Conversely when temperature increases, with strain regular, density decreases.
The equations describing those legal guidelines are unique cases of the best gasoline regulation, PV = NRT, wherein P is the pressure of the gas, V is its extent, n is the number of moles of the gas, T is its kelvin temperature, and R is the ideal (common) gas constant.
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What is the empirical formula for a compound if a sample contains 3.72 g of p and 21.28 g of cl? pcl5 pcl3 p2cl10 p2cl5
Answer:
A.) PCl₅
Explanation:
To determine the empirical formula, you need to (1) identify the atomic masses of both elements (from the periodic table), then (2) convert each element from grams to moles (via atomic masses), then (3) divide both elements by the smallest molar value of both, and then (4) construct the empirical formula.
(Step 1)
Atomic Mass (P): 30.974 g/mol
Atomic Mass (Cl): 35.453 g/mol
(Step 2)
3.72 g P 1 mole
--------------- x ------------------ = 0.120 mole P
30.974 g
21.28 g Cl 1 mole
----------------- x ------------------- = 0.600 mole Cl
35.453 g
(Step 3)
Because 0.120 mole is smaller than 0.600 mole, you need to divide both elements by this value to determine the ratio of the elements in the empirical formula.
0.120 mole P / 0.210 mole = 1.00 mole P
0.600 mole Cl / 0.210 mole = 5.00 moles Cl
(Step 4)
The molar value of each element represents the amount of each element in the formula. This value shows itself in the form of subscripts in the formula. This makes the correct empirical formula:
PCl₅
How many moles of NH3 would be formed from the complete reaction of 16.0 g H2?
Taking into account the reaction stoichiometry, 5.33 moles of NH₃ are formed from the complete reaction of 16 grams of H₂.
Reaction stoichiometryIn first place, the balanced reaction is:
N₂ + 3 H₂ → 2 NH₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
N₂: 1 moleH₂: 3 molesNH₃: 2 molesThe molar mass of the compounds is:
N₂: 14 g/moleH₂: 2 g/moleNH₃: 17 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
N₂: 1 mole ×14 g/mole= 14 gramsH₂: 3 moles ×2 g/mole= 6 gramsNH₃: 2 moles ×17 g/mole=34 gramsMass of NH₃ formedThe following rule of three can be applied: if by reaction stoichiometry 6 grams of H₂ form 2 moles of NH₃, 16 grams of H₂ form how many moles of NH₃?
[tex]moles of NH_{3}= \frac{16 grams of H_{2} x2moles of NH_{3}}{6 grams of H_{2}}[/tex]
moles of NH₃= 5.33 moles
Then, 5.33 moles of NH₃ are formed from the complete reaction of 16 grams of H₂.
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3. as a substitution reaction occurs, the number of electrons shared between
carbon atoms
a) increases
b) decreases
c) remains the same
c) remains the same
In a substitution reaction, number of electrons remain the same.
What is a substitution reaction?
When one functional group in a chemical molecule is replaced by another functional group, the chemical reaction is known as a substitution reaction.
It is also known as single displacement reaction or single replacement reaction.
Example: Iodoethane and water are produced when hydrogen iodide and ethanol combine.
CH₃CH₂OH + HI → CH₃CH₂I + H₂O
In this reaction OH is substituted or replaced by I giving CH₃CH₂I.
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500 ml of nitrogen and 500 ml of hydrogen are kept together in one vessel at the same constant temperature and pressure. Which of the following is true for their number of molecules?
A. NN2 > NH2
B. NN2 < NH2
C. NN2 = N H2
D. NN2 + NH2 = 1 mole
The number of molecules of nitrogen will be the same as the number of molecules of hydrogen. The correct option is C.
What is Avogadro's law?The law states that different gases of the same volume stored at the same temperature and pressure will contain the same number of molecules.
Going by Avogadro's law, 500 ml of nitrogen and 500 ml of hydrogen kept together in one vessel at the same constant temperature and pressure will have the same number of molecules.
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A 2.0 L party balloon at 98 kPa is taken to the top of a mountain where the pressure is 75
kPa. Assume that the temperature and chemical amount of the gas remain the same,
determine the new volume of the balloon.
Answer:
2.61 L
Explanation:
p1v1 = p2v2
p1v1 / p2 = v2
98 * 2 / 75 = v2 = 2.61 L
How does the concentration of the solute relate to the osmolarity of the solution and osmot- ic pressure
The concentration of the solute is directly proportional to the osmolarity of the solution and osmotic pressure.
What is the relationship between the osmolarity and the concentration of a solute?The measure of the amount of solute that has been dissolved in a solution or solvent is said as the concentration of the solute.Osmolarity is nothing but the total concentration of solutes in the solution. A solution with high osmolarity has more solute particles in the solution and with low osmolarity has fewer solute particles in the solution.So, the concentration of the solute is directly proportional to the osmolarity of the solution. (per liter)How does the osmotic pressure and the concentration of the solute are related?The pressure required to stop the flow of solvent across the osmosis membrane(semipermeable membrane) is known as osmotic pressure.When the concentration of the solute increases the osmotic pressure also increases.When the concentration of the solute decreases the osmotic pressure also decreases.So, the osmotic pressure is directly proportional to the concentration of the solution.Thus, the concentration of the solute directly proportional to the osmolarity of the solution and osmotic pressure.
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Question 2 of 15
Which statement is true of both nuclear fusion and nuclear fission?
A. The nucleons in the resulting nuclei differ from the nucleons in the
original nuclei.
B. The products are nuclei of elements that are different from the
original elements.
C. All the nuclei involved in the nuclear reaction represent the same
element.
D. The nucleons in the original nuclei are destroyed by the process.
Answer:
B. The products are nuclei of elements that are different from the original elements.
In a reaction between iron(II) sulfide and oxygen, iron(III) oxide and
sulfur dioxide are produced. How many moles of O₂ is required to
produce 7.66 moles of Fe₂O3?
4FeS + 70₂ + 2Fe₂O3 + 4S02
a 26.81 moles
b 2.17 moles
c 7.60 moles
d None of the above
Answer:
26.81 moles
Explanation:
From the coefficients of the equation, we know that for every 2 moles of iron(III) oxide produced, 7 moles of oxygen are consumed.
So, the answer is 7.66(7/2), which is 26.81 mol.
D. how many milliliters of a 0.8 m solution of citric acid would be needed to react with 15 grams of baking soda
The volume of 0.8 M solution of citric acid required would be 75mL.
Given:
Concentration of citric acid =0.8M
Mass of baking soda = 15 g
Balanced chemical equation for the reaction of baking soda(NaHCO₃ ) with citric acid (C₆H₈O₇) is:
C₆H₈O₇ + 3NaHCO₃ -----> 3H₂O + 3CO₂ + Na₃C₆H₅O₇
Therefore, 1 mole of citric acid needs 3 moles of baking soda
Molar mass of baking soda = 84g/mol
No. of moles of baking soda = mass of baking soda / molar mass of baking soda = 15g ÷ 84g/mol = 0.178 moles
Thus no. of moles of citric acid required = (1 ÷ 3) × 0.178mole =0.06mole
Molarity = no. of moles of / volume (in mL) x 1000
Volume of citric acid solution required= (0.06mole ÷ 0.8M) × 1000ml
=75ml
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A mixture of He , Ar , and Xe has a total pressure of 3.00 atm . The partial pressure of He is 0.200 atm , and the partial pressure of Ar is 0.200 atm . What is the partial pressure of Xe ? Express your answer to three significant figures and include the appropriate units.
The partial pressure of Xe is 2.60atm
The sum of the partial pressures is equal to the total pressure. Ptotal = P1 + P2 + P3... .To calculate the partial pressure of one of the components of a mixture, subtract the sum of known partial pressures of the other components from the total pressure.
Given the values of
PHe=0.20 atm
PAr=0.20 atm
Ptotal=3.00 atm
We need to find PXe
Solution: Determine the sum of the partial pressures of helium and argon, then subtract the sum from the total pressure.
PHe+PAr =0.20 atm + 0.20=0.400 atm
PXe=3.00atm−0.400=2.60 atm
Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.
According to Dalton's Law, a perfect gas mixture's total pressure equals the sum of its constituent gases' individual partial pressures.
The thermodynamic activity of a gas's molecules is gauged by its partial pressure.
Gases react, disperse, and dissolve based on their partial pressures rather than the concentrations they have in liquids or other gas combinations.
This general characteristic of gases holds true in biological chemical interactions involving gases.
Hence the partial pressure of Xe is 2.60atm
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