Question

Calculate the number of moles for 52 g of He?
A. 13 mol
Oo oo
O B. 10 mol
C. 15 mol
O D. 6 mol​

Answer 1

The molar mass that is the mass of 6.022 X 1023 atoms of helium is 4g. Hence 1 mole of He = 4 g of He = 6.022 X 1023atoms of He. 1 g of He = (6.022 X 1023) / 4 atoms of He. 52 g of He = (6.022 X 1023X 52 ) / 4 atoms of He

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