How many moles of $S$ are in 25 g of $S$ ?

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Answer 1 · 2018-07-31T01:29:35

0.78 mols

From the periodic table, the atomic mass of sulfur (S) is 32.065 g/mol. We can present the atomic mass in either conversion factors:

$("32.065 g S")/("1 mol S") or ("1 mol S")/("32.065 g S")$

To convert from grams to moles, we'll use the atomic mass like this so that the g of S will cancel off each other, giving moles of S:

$"moles of S" = "25" cancel("g S") xx ("1 mol S")/(32.065 cancel("g S")) = 0.78 " mols S"$

How many moles of SS are in 25 g of SS?