Question

Calculate the mass of 100 He atoms in gram.​

Answer 1

Answer:

Avogadro's constant says that 1 mole of any atom contains Na atoms. In this case you have 2 atoms. moles of helium is =

Na

2

The atomic mass of helium (He) will give you the weight of one mole of this molecule: 1 mol = 4.00 g

Na

2

moles mass = 4.00g×

Na

2

=

Na

8

answer is C

Answer 2

Explanation:

1 mol of atoms = 6.022×1023 atoms . Then divide the molar mass by 6.022×1023 atoms/mol .