Stoichiometric Calculations Answers

The Haber process can be used to produce ammonia (NH3) from hydrogen gas (H2) and nitrogen gas (N2). The balanced equation for this process is shown below.3H2 + N2 2NH3The molar mass of NH3 is 17.03 g/mol. The molar mass of H2 is 2.0158 g/mol. In a particular reaction, 0.575 g of NH3 forms. What is the mass, in grams, of H2 that must have reacted, to the correct number of significant figures?

The chemical equation below shows the photosynthesis reaction.6CO2 + 6H2O C6H12O6 + 6O2The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.02 g/mol. A reaction uses 528 g of CO2. How many moles of water are used in this reaction?

Chandra wants to know how many moles are contained in 150.0 g CCl4 (carbon tetrachloride). What quantity of CCl4 should she use to make this conversion?

The chemical equation below shows the reaction between carbon dioxide (CO2) and lithium hydroxide (LiOH). CO2 + 2LiOH Li2CO3 + H2OThe molar mass CO2 is 44.01 g/mol. How many moles of LiOH are needed to react completely with 25.5 g of CO2?

The chemical equation below shows the burning of magnesium (Mg) with oxygen (O2) to form magnesium oxide (MgO).2Mg + O2 2MgONiven wants to calculate the mass of MgO that is produced by the burning of 28.0 g of Mg. What is the first step in Niven’s calculation?

The molar mass of sucrose (C12H22O11) is 342.3 g/mol. A chemist has a 0.500-mol sample of sucrose. What is the mass, in grams, of this sample?

The molar mass of nitrogen (N2) is 28.02 g/mol. What is the mass, in grams, of 4.60 mol of N2?

A chemist has 2.0 mol of methanol (CH3OH). The molar mass of methanol is 32.0 g/mol. What is the mass, in grams, of the sample?

The chemical equation below shows the reaction between tin (Sn) and hydrogen fluoride (HF).Sn + 2HF SnF2 + H2The molar mass of HF is 20.01 g/mol. How many moles of Sn are required to react completely with 40 g of HF?

The chemical equation below shows the decomposition of nitrogen triiodide (NI3) into nitrogen (N2) and iodine (I2).2NI3 N2 + 3I2The molar mass of NI3 is 394.71 g/mol. How many moles of I2 will form 3.58 g of NI3?