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laiz [17]
3 years ago
12

What is the percent composition by mass of sulfur in the compound MgSO4 (gram-formula mass =120. grams per mole)?(1) 20.% (2) 27

% (3) 46% (4) 53%
Chemistry
1 answer:
TEA [102]3 years ago
8 0
<span>Solving for the percent composition by mass of sulfur. The formula would be: %S = mass of sulfur / mass of compound x 100% Plugging in our data: %S = 32 amu / 120 amu x 100% %S = 0.266666 x 100% %S = 26.66% Rounded off to two significant numbers it will be 27%. Therefore the answer is number 2.</span>
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H2SO4(aq) + MgO(s) → H2O(l) + MgSO4(aq)

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We must recall that the oxides of metals are bases. These metal oxides can react with dilute acids to yield salt and water.

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In this case we need magnesium oxide and dilute sulphuric acid. The reaction occurs as follows;

H2SO4(aq) + MgO(s) → H2O(l) + MgSO4(aq)

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