Investigation 7 Chemistry

Front

What is Stoichiometry?

Back

Stoichiometry is the analytical computation of reagents based on a balanced chemical reaction equation.

Front

How do you calculate the mass of a product formed in a chemical reaction?

Back

Use stoichiometric ratios from the balanced equation and the masses of the reactants to find the mass of the product.

Front

What is the balanced equation for the reaction of zinc and hydrochloric acid?

Back

Zn + 2HCl → ZnCl2 + H2

Front

How many moles of aluminum sulfate are produced from 250g of H2SO4?

Back

0.85 moles of aluminum sulfate are produced.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of atoms or molecules in one mole of a substance.

Front

How many atoms are in 4 moles of gold?

Back

There are 2.41 x 10^24 atoms in 4 moles of gold.

Front

What is the mole ratio in the reaction 2H2 + O2 → 2H2O?

Back

The mole ratio is 2 moles of H2 to 1 mole of O2 to 2 moles of H2O.

Front

How many moles of water are produced from 8.3 moles of hydrogen?

Back

8.3 moles of H2 would produce 8.3 moles of H2O.

Front

What is the purpose of a balanced chemical equation?

Back

A balanced chemical equation ensures that the number of atoms for each element is conserved in a chemical reaction.

Front

Define Chemical Analysis.

Back

Chemical Analysis is the process of determining the composition of a substance.