V = nRT/P
V = 0.685 mol*(.0821 L*atm/K*mol)*273 K/1 atm
<span>https://www.onetonline.org/find/career?c=6</span>
The answer is: the mass of 6.02 x 1023 representative particles of the element.
The base SI unit for molar mass is kg/mol, but chemist more use g/mol (gram per mole).
For example, molar mas of ammonia is 17.031 g/mol.
M(NH₃) = Ar(N) + 3 · Ar(H) · g/mol.
M(NH₃) = 14.007 + 3 · 1.008 · g/mol.
M(NH₃) = 17.031 g/mol.
The molar mass (M) is the mass of a given substance (in this example ammonia) divided by the amount of substance.
I think it’s A I’m not 100% sure but I mean it’s worth a try
