Page 15 - Chemistry

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According to the Law of According to the Law of

Conservation of Mass, how many Conservation of Mass, how many

grams of hydrogen are needed? grams of sulfur are needed?

2H + O → 2H O Fe + S → FeS
2
2
2

___ g + 15 g → 40 g 75 g + ___ g → 250 g

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According to the Law of According to the Law of

Conservation of Mass, how Conservation of Mass, how

many grams of hydrochloric many grams of magnesium

acid are needed? are needed?

2H + Cl → 2HCl 4Mg + 2O → 4MgO

2
2
2
65 g + 35 g → ___ g ___ g + 175 g → 500 g

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