The Mole – Chemistry Test Questions – Flashcards
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How many particles of MgSO4 are in 0.34 moles
answer
2.0E23 parts
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How many particles of CCl4 are in 1.78 moles
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1.07 E24 parts
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How many grams of calcium are in 1.25 moles of calcium
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50.1 g
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How many grams of lithium are in 0.09 moles of lithium
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0.6 g
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Calculate the molar mass of AuNO3
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258.98 g/mol
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Calculate the molar mass of Cr2(SO4)3
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392.2 g/mol
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Calculate the molar mass of calcium chloride dihydrate & what is the percentage of water
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150.01 24.07
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How many grams are in 0.85 moles of Ba(NO3)2
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220
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How many grams are in 2.89 moles of (NH4)2 O
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151g
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How many particles are in 3.87g of Rb2S
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1.15E22 f.u.
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How many particles are in 25.9g of N2O
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3.54E23 f.u.
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Calculate the percent composition of sodium carbonate
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Na- 65.69 C-34.31
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Determine the empirical formula for a compound that is 89.1% gold and 10.9% oxygen
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Au2O3
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Determine the empirical formula for a compound that is 36.8% iron 21.1% sulfur and 42.1% oxygen
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FeSO4
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Find the molecular formula for an unknown compound whose empirical formula is C2H4O. The molar mass of the compound is 88.11 g/mol
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C4H8O2
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Artificial pineapple flavoring has the empirical formula C3H6O. The molar mass of this compound is 116.16 g/mol What is the molecular formula
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C6H12O2
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Find the empirical formula of a compound that is 36.5% sodium 25.44% sulfur, and 38.08% oxygen
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Na2SO2
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A compound has an empirical formula of NO2 and a molar mass of 92.02 g/mol what is teh molecular formula
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N2O4
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A compound has an empirical formula of C2H3O4 and a molar mass of 172 g/mol what is the molecular formula
answer
C8H12O4
