Certain temp and pressure 0.20 mol carbon dioxide has volume of 3.1L. Hydrogen 3.1 at same temp and pressure?

Question

a. contains same number of atoms

b. contains some number of molecules

c. same mass

d. higher density

Answer 1

0.20 mole CO2 = 3.1 L

0.20 mole of any ideal gas at the same P and T will = 3.1 L

3.1 L of H2 has the same number of molecules as CO2

ANSWER=b.

not a) CO2 has 3 atoms/molecule; H2 has 2 atoms per molecule

not c) 0.20 mol CO2 mass = 8.8 g; 0.20 mole H2 = 0.4 g

not d) 8.8g/3.1L > 0.4g/3.1L

Answer 2

B. Use the ideal gas law. PV=nRT

Since V, P, T, and R(constant) are the same...

n must be the same too. Therefore, they have the same number of moles, and moles is representation of the number molecules.

Answer 3

b correct answer