2. Write the ratio by mass in the following compounds:
a. Magnesium oxide (MgO) b. Sodium chloride (NaCl) c. Water (H2O)
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Answer:
a. Magnesium oxide (MgO) = 3:2
b. Sodium chloride (NaCl) = 23:35.5
c. Water (H2O) = 1:8
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