In one reaction, 0.507 mol of SiCl4 is produced. How many molecules of chlorine were used in the reaction?

Round 12: A compound consists of 17.6% hydrogen and 82.4% nitrogen. Determine the empirical formula of the compound.

Mass of 0.82 mol of a diatomic molecule is 131.3 g Identify the molecule

A 26.2g sample of oxalic acid hydrate (H2C2O4 • 2H2O) is heated in an oven until all the water is driven off. How much of the anhydrous salt is left?

Round 15: Tartaric acid, also known as Cream of Tartar, is used in baking. Its empirical formula is C2H3O3. If 1.00mol of tartaric acid contains 3.61x1024 oxygen atoms, what is the molecular formula of tartaric acid?

Round 13: Compound X contains 69.9% carbon, 6.86% hydrogen, and 23.3% oxygen. Determine the empirical formula of Compound X.

Analysis of a metal chloride XCl3, shows that it contains 67.2% Cl by mass. Calculate the molar mass of X and identify the element.

How many grams are in 1.54 mol of beryllium?

Indigo (C16H10N2O2) is the common name of the dye that gives blue jeans their characteristic colour. Calculate the mass of oxygen in 25.0 g of indigo.

a reactant that is still present after a chemical reaction is complete

2NaN3(s) --> 3N2(g) + 2Na(s) To inflate the air bag on the driver’s side of the car, 80.0g of N2 is required. What mass of NaN3 is needed to produce 80.0g of N2?

How many grams are in 2.73 mol of lithium?