Moles
How many atoms are in 5 moles of silver?
3.01 x 1024 atoms of silver
Calculate the mass percent of oxygen in carbon monoxide.
16/28 = 57.14 %
What is the empirical formula of a compound containing 40.0% sulfur and 60.0% oxygen by mass?
SO3
A sample of fuel is found to contain 87.4% nitrogen and 12.6% hydrogen. If the molecular mass of the fuel is 32.05 grams/mole, what is the molecular formula of the fuel?
N2H4
Iron (III) phosphate
FePO4
How many moles of sulfur are in 53.7 grams of sulfur?
1.67 moles of sulfur
Calculate the mass percent of silver in Silver (I) Chloride
108/143 = 75.52%
What is the empirical formula for a compound containing 38.8% carbon, 16.2% hydrogen, and 45.1% nitrogen?
CH5N
The vanillin molecule is the primary molecule present in vanilla extract. The molecular mass of vanillin is 152.08 grams per mole and contains 63.18% carbon, 5.26% hydrogen, and 31.56% oxygen. What is the molecular formula of vanillin?
C8H8O3
Co (NO3)2
Cobalt (ii) nitrate
How many atoms of gold are in 1.00 gram of gold?
3.06 x 1021 atoms of gold
What is the mass percent of barium in Barium Sulfate?
137/233 = 58.88%
What is the molecular formula of the molecule that has an empirical formula of CH2O and a molar mass of 120.12 g/mol
C4H8O4
A compound is analyzed and found to have a mass of 289.9 grams/mole and contain 49.67% carbon, 48.92% chlorine and 1.39% hydrogen. What is the molecular formula of the compound?
C12H4Cl4
KF
Potassium flouride
How many atoms of hydrogen are in 1 mole of water (H20)?
1.20 x 1024 atoms of hydrogen
Calculate the mass percent of chlorine in Copper (II) chloride?
63.5/135.5 = 46.86
What is the empirical formula of a compound containing 23.7g carbon, 5.3g hydrogen, and 21.02 g oxygen?
C3H8O2
Find the empirical formula for a compound containing carbon, hydrogen, and oxygen. There is a 8.25 g sample of the compound. It contains 40.6 % carbon and the sample contains 2.53 x 1023 atoms of hydrogen.
C2H3O2
PCl5
Phosphorous pentachloride