HanahJai HanahJai

22-10-2016
Chemistry

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How many grams are there in 7.4x10^23 molecules of Na2SO4?

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Willchemistry Willchemistry

23-10-2016

molar mass Na2SO4 = 142.04 g/mol

142.04 g -------------- 6.02x10²³ atoms
?? g ------------------ 7.4x10²³ atoms

142.04 x ( 7.4x10²³) / 6.02x10²³

=> 174.60 g

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