A student has a 10.0 g sample of helium gas (He) and a 10.0 g sample of neon gas (Ne)
CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance
Problem
A student has a 10.0 g sample of helium gas (He) and a 10.0 g sample of neon gas (Ne). (Relative atomic masses: He = 4.00; Ne = 20.18.) Which statement correctly compares the number of atoms in the two samples?
(a) Both samples contain the same number of atoms because both masses are 10.0g.
(b) The helium sample contains more atoms because helium has the smaller molar mass.
(c) The neon sample contains more atoms because its molar mass is greater.
(d) The number of atoms in the two samples cannot be compared without knowing the volumes and conditions of the gases.