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Find the formula for the compound that contains 72.40% iron and 27.60% oxygen.
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Which is the percent composition of phosphorus in Zn3(PO4)2?
16.1 %
9.66 %
c %
d % 2
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Which term is described as the lowest whole-number ratio of elements in a compound?
hydrate
molecular formula
c. empirical formula
d. percent composition
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Which term is described as the percent by mass of any element in a compound?
hydrate
molecular formula
c. empirical formula
d. percent composition
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The mass of each element making up 37.2 grams of a compound were measured. Based on these data, what is
the correct formula for the compound?
Element: Mass:
Magnesium g
Carbon g
Oxygen g
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A mass of 2.50 g of hydrated copper(II) sulfate is placed in a crucible and heated. On heating, 1.59 g of white
anhydrous copper(II) sulfate is left behind. Determine the ratio of water to copper(II) sulfate.
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The empirical formula for a compound is CH2O, and the molar mass is g/mol. Which is the molecular
formula for this compound?
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What is the correct name for the hydrate with the following composition?
67.70% FePO4
32.30% H2O
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Determine the empirical formula for a g sample of a compound having the following percent composition.
94.07% sulfur and 5.93% hydrogen
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A compound was found to contain 49.98 g of carbon and g of hydrogen. The molar mass of the compound is g/mol. Determine the molecular formula.
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An g sample of a common hydrate of cobalt(II) chloride is heated. After heating, mol of anhydrous cobalt chloride remains. What is the formula and the name for this hydrate?
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Propane is a hydrocarbon, a compound composed only of carbon and hydrogen. It is 81.82% carbon and 18.18% hydrogen. What is the empirical formula?
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What is the percent composition of each element in phosphoric acid?
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What is the percent composition of potassium in potassium sulfate?
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