Question #f171f

1 Answer
SCooke
Jul 6, 2017

#30 grams#

Explanation:

The molecular weight of #SiO_2# is 60g/mol, so 50.0g is 0.833 moles and there are therefore 0.833 moles of #O_2# available for reaction.

Whatever the reaction is, assuming that all of the oxygen is reacted to form water, and oxygen atoms combine in a 1:2 ratio with hydrogen atoms #2H_2 + O_2 → 2H_2O# we can see that each mole of #O_2# can produce two moles of water. Therefore, the moles of water produced is #2 * 0.833 = 1.67#. The molecular weight of water is 18, so this number of moles will yield #1.67mol * 18g/"mol" = 30g# of water.

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