10 Questions
What is the total number of moles of atoms in one mole of a compound?
6.022 x 10^23
What is the percentage of oxygen in Cu(OH)2?
33.4%
What is the empirical formula of a compound with the molecular formula C6H18O3?
CH3O
What is the mass of one mole of NaCl?
58.44 g
What is the percentage of carbon in a compound with the molecular formula C6H18O3?
43.5%
How many moles of CO2 are in 92.87 liters of CO2 gas at STP?
4.15 moles
What is the mass percentage of element Y in a compound XY with a total mass of 42.6 grams, where Y has a mass of 22.9 grams?
53.8%
What is the molar mass of Krypton gas (Kr)?
83.80 g/mol
What is the density of a gas at STP?
1 g/L
How many liters of Hydrogen gas at STP are in 3.8 moles?
84.8 L
Calculate the percent composition of a compound containing only magnesium and oxygen. Learn how to find the percent by mass of an element in a compound from given mass data.
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