Chemistry Unit 3 (11)

91.38% yield

Sodium chloride is produced when sodium metal combines with chlorine gas as shown in the following balanced equation: 2 Na + Cl2 → 2 NaCl. In an experiment, 36.9 g of sodium chloride is produced when 15.9 g of Na and 27.4 g of chlorine are combined. Determine the percentage yield of the product.

2.63 g NO

Take the reaction: NH3 + O2 -> NO + H2O. In an experiment, 3.25 g of NH3 are allowed to react with 3.50 g of O2. How many grams of NO are formed?

O2

Take the reaction: NH3 + O2 -> NO + H2O. In an experiment, 3.25 g of NH3 are allowed to react with 3.50 g of O2. Which reactant is the limiting reagent?

1.76 g NH3 left

Take the reaction: NH3 + O2 ->,k NO + H2O. In an experiment, 3.25 g of NH3 are allowed to react with 3.50 g of O2. How much of the excess reactant remains after the reaction?

2.0 mol

Two molecules of solid mercury(II) oxide decomposes to form two molecules of liquid mercury and one molecule of oxygen gas. What amount of oxygen is produced from the decomposition of 4.0 mol of mercury(II) oxide.

C8H10N4O2

What is the molecular formula for caffeine with empirical formula C4H5N2O and molar mass 194.19 g/mol? Use the following molar masses: MMC = 12.01 g/mol MMH = 1.01 g/mol MMO = 16.00 g/mol MMN = 14.01 g/mol

117.39 g

Dinitrogen pentoxide (N2O5) will decompose into nitrogen dioxide (NO2) and oxygen (O2). What mass of dinitrogen pentoxide is required to produce 100.00 g of nitrogen dioxide? The molar mass of dinitrogen pentoxide is 108.01 g/mol, and the molar mass of nitrogen dioxide is 46.0055 g/mol.