Question #191c4

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Answer 1 · 2017-10-02T03:50:42

3.17 moles.

2.dp

We have:

2 sodium atoms at 22.99 grams per mole = 45.98
1 sulfur atom at 32.06 grams per mole = 32.06
4 oxygen atoms at 15.99 grams per mole = 63.96

#45.98+32.06+63.96= 142# grams per mole.

Since:

Number of moles x molar mass = mass in grams.

Mass in grams #-:# molar mass = number of moles.

#450/142= 3.17# moles. 2.d.p