CHEMISTRY HIGH SCHOOL

Assuming constant pressure and temperature, how many moles of gas have been added to the initial 3 moles of gas when the volume increases from 2.0 to 4.0 liters?1.5 moles

2 moles

3 moles

6 moles

Answers

Answer 1

Answer:

Answer:

Moles of gas added = 3 moles

Explanation:

Given:

Initial volume of gas, V1 = 2.0 L

Initial moles of gas, n1 = 3 moles

Final volume, V2 = 4.0 L

To determine:

The moles of gas added to bring the final volume to 4.0 L

Explanation:

Based on the ideal gas equation

$PV = nRT$

where P = pressure, V = volume ; n = moles of gas

R = gas constant, T = temperature

At constant P and T, the above equation becomes:

V/n = constant

This is the Avogadro's law

Therefore:

$(V1)/(n1) = (V2)/(n2) \n\nn2 = (V2)/(V1) * n1 = (4.0 L)/(2.0L) * 3 = 6 moles$

The final number of moles of gas = 6

Thus, moles added = Final - Initial = n2 - n1 = 6-3 = 3 moles

Answer 2

Answer: We first assume that the gas is ideal which is a safe assumption to approximate the answer to the problem. Then we need to know the ideal gas equation and that is:

PV=nRT
where
P- pressure
V- volume
n-number of moles-
R- ideal gas constant
T-temperature.

Since we know that P, T and V are constant, rearranging the equation would lead to:

P/TR = n/V or the ratio of the moles of gas and volume is constant.

(3moles)/2L = (3+x)/4L
where
x is the additional moles.

Solving for x = 3 moles.

Related Questions

Regarding the formula Al2O3 which of the following is accurate?A. The coefficient 3 indicates that there are a total of three atoms of oxygen present in the substance. B. The subscript 2 indicates that two atoms of oxygen are present in the substance. C. The chemical symbol Al indicates that oxygen is present in the substance. D. The subscript 2 indicates that two atoms of aluminum are present in the substance
Omar wrote a hypothesis about batteries called dry cells.If more dry cells are connected end to end, a light bulb will work longer because there is more energy available. What are the variables in his hypothesis?
The molar mass of I2 is 253.80 g/mol, and the molar mass of NI3 is 394.71 g/mol. How many moles of I2 will form 3.58 g of NI3?
How many fluorine atoms bond with calcium to form calcium fluoride?
Which force holds the nucleus of an atom together?A. Strong nuclear forceB. Weak nuclear forceC. Electrostatic forceD. Gravity

What action could slow a chemical reaction rate?a. lowering the pressure
b. raising the temperature
c. increasing the concentration
d. adding more of a substance to a mixture

Answers

The action that could slow a chemical reaction rate is adding more of a substance to a mixture. The answer is letter d. It does not give time for the rest of the reactants to be consumed because you are adding more of it causing to slow the reaction.

Given the balanced equation representing a reaction:NH3(g) + H2O(l) ==>NH4+(aq) + OH-(aq)
According to one acid-base theory, the NH3(g) molecules act as
(1) an acid because they accept H+ ions
(2) an acid because they donate H+ ions
(3) a base because they accept H+ ions
(4) a base because they donate H+ ions

Answers

According to the Bronsted-Lowry concept of acids and bases, a base accepts protons. Here NH₃ accepts a proton to form the conjugate acid NH₄⁺. Hence, it acts as a base.

What is Bronsted-Lowry concept?

There are various theories regarding the nature of acids and bases. According Bronsted-Lowry concept of acids and bases, acids are substances which donates a proton and bases are proton accepters.

The species which is formed by donating a proton from the acid is called conjugate base of the acid and the species which is formed after a base accepts a proton is called the conjugate acid of the base.

Consider the given reaction of ammonia with water. Here water is a proton donor and thus acts as an acid whereas ammonia accepts the proton from water forming its conjugate acid NH₄⁺. Water forms its conjugate base OH-. Therefore NH₃ acts as a base in this reaction.

To find more on Bronsted-Lewis concept, refer here:

brainly.com/question/15208733

#SPJ2

(2) a base because they accept H+ ions. NH3 is the conjugate base of NH4+.

How are regional climate patterns caused by atmospheric and ocean flows

Answers

Answer:

Ocean currents act as conveyer belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate. .

What are 3 things an Apple, Knife and Mirror have in common?

Answers

1)They are all take up space.
2)They all have mass.
3)They are all solids.

Because of 1 and 2, they are all matter.

Some isotopes of elements are unstable and decay into other, more stable isotopes over time. for example, it takes 153 years for half of a sample of silicon (si) atoms with 14 protons, 14 electrons, and 18 neutrons to decay. what is the name of this specific silicon isotope.a. silicon-14
b. silicon-32
c. silicon-46
d. silicon-153

Answers

The correct answer is option a, silicon-14

Number of electrons = 14

Number of protons = 14

Number of neutrons = 18

Since atomic number is equal to the number of protons, the atomic number of this specific silicon isotope is 14.

Also, mass number is equal to number of protons and number of neutrons. So mass number so this specific silicon isotope is 14 + 18 = 32

The name of this specific silicon isotope is silicon-14.

Silicon-14 is represented as ³²Si₁₄

In 1803, the British chemist John Dalton proposed several atomic theories. Which one of his theories was later shown to be incorrect?I. Atoms are indivisible and indestructible particles.

II. All atoms of the same element are exactly alike.

III. Atoms of different elements are different.

IV. Atoms combine in specific numerical ratios to form compounds.

A. II only
B. II & III only
C. I & II only