# Chemistry

2 moles of helium (He) are pumped from a gas canister into a weather balloon. The balloon at this point has a volume V1.
1 mole of nitrogen gas (N2) is added at the same temperature and pressure. The volume of the balloon changes to V2.

How will the new volume of the balloon compare with the old volume (V1)?
1) 2 × V1
2) 0.50 × V1
3) None of these
4) There will be no change in volume.
5) 1.5 × V1
6) 0.67 × V1

1. 👍 0
2. 👎 0
3. 👁 268
1. Won't it be V1*(3/2)?
P1V1 = n1RT but P, R and T are constants so V1 = kN1 and V2 = kN2
(V1/V2) = (n1/n2)

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Chemistry

A helium balloon contains 0.50 g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?

asked by Anonymous on July 3, 2015
2. ### Chem

A balloon contains 30.0 L of helium gas at 103 kPa. What is the volume of the helium when the balloon rises to an altitude where the pressure is only 25.0 kPa? Assume that the temperature remains constant

asked by Shrell on January 19, 2011
3. ### Chemistry

A helium balloon contains 0.54g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?

asked by Mira on February 22, 2013
4. ### chemistry

A helium balloon contains 0.30g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?

asked by bob on September 24, 2014
5. ### Science

Helium gas in a balloon occupies 2.5 L at 300.0 K. The balloon is dipped into liquid nitrogen that is at a temperature of 80.0 k. What will the volume of the helium in the balloon at the lower temperature be? I got a weird answer

asked by Lauren on February 12, 2011
1. ### chemistry

Assume that the balloon is filled with carbon dioxide gas at 20°C and standard pressure. Use the ideal gas law to calculate the number of moles and mass of CO2 in each balloon at maximum inflation. balloon 1 volume-150.53 balloon

2. ### Science

Helium gas is added to a ballon already partially filled with helium gas the balloon inflated because the

asked by Star on February 5, 2012
3. ### Chemistry

A Mylar Happy Birthday balloon contains 5.15 L of helium gas at 19.4oC. If the pressure remains constant, what will be the volume of helium in the balloon, in L, when the temperature is increased by 6.6oC?

asked by Mindy on July 28, 2015
4. ### PHYSICS

A large balloon of mass 237 kg is filled with helium gas until its volume is 318 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. (b) Calculate the buoyant force acting on the balloon.

asked by Amy on November 8, 2012
5. ### chemistry

A weather balloon is filled with 0.295 m3 of helium on the ground at 18 °C and 756 torr. What will the volume of the balloon be at an altitude of 10 km where the temperature is 48 °C and the pressure is 0.14 atm?

asked by jun on November 5, 2014
6. ### Chemistry

You have two gas-filled balloons, one containing He and the other H2. The H2 balloon is twice the size of the He balloon (let the He balloon have a volume of 1 -L and the H2 balloon. a volume of 2 L). The pressure of gas in the H2

asked by Bria on February 19, 2012