B.) Helium have <span>two protons and two electrons
Hope this helps!</span>
There are ALOT because they would always come in and out and they will burst which creates more so techneclly there are infinate
I believe it is C, but I can't guarantee it.
Answer: The mass of the gas is 18.3 g/mol.
Explanation:
To calculate the rate of diffusion of gas, we use Graham's Law.
This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows:




Squaring both sides and solving for 

Hence, the molar mas of unknown gas is 18.3 g/mol.