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Chemical Composition
1. How many grams are contained in 0.44 moles of calcium?
2. Convert 4.54 moles magnesium carbonate to
molecules.
3. What is the mass of 4.1 x 1020 molecules of carbon monoxide?
4.
How many particles are contained in 1.67 g CaO?
5. The number of nitrogen molecules in 5.2 moles
of N2 is ________.
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How many moles of CO2 contain 2.79 x 1024 molecules?
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What is the mass, in grams, of 4.59 moles of oxygen gas?
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Elemental analysis of a compound showed that it consisted of 54.53% carbon, 9.15% hydrogen and 36.32% oxygen
How many hydrogens appear in the empirical formula of the compound?
A) 2
B) 4
C) 6
D) 9
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If 200 grams of salt is dissolved in 8000 grams of water,
what is the salt concentration in percent?
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Calculate the mass of carbon which contains the same amount of atoms as 20 g of sulfur
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How many oxygen atoms are in one mole of propanol?
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Which of the following has the same number of atoms as 55.8 grams of Fe?
55.8 g He
32.0 g O3
32.0 g O2
16.0 g O2
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How many molecules of ibuprofen (C15H18O2) contain 2.84 x 1023 atoms
of hydrogen?
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How many grams are 4.2 x 1024 atoms of sulfur?
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What is the mass in grams of 2.50 gal of water?
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Find the number of moles in 4.96 g of B2O3?
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The process in which solid converts into gas directly is known as?
A. vaporization
B. sublimation
C. crystallization
D. distillation
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Would ammonia be a solid, liquid or gas at
a) -55 °C
b) -17°C
c) -113°C
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