Stoichiometry Review

Front

What is stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (grams per mole).

Front

What is the molar mass of CaCO3?

Back

The molar mass of CaCO3 (Calcium Carbonate) is approximately 100.09 g/mol.

Front

How many grams are in 5.5 moles of CaCO3?

Back

550 grams.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation, reflecting the conservation of mass.

Front

What is the balanced equation for the reaction of CaC2 and H2O?

Back

CaC2(s) + 2 H2O(l) --> C2H2(g) + Ca(OH)2(aq).

Front

What is a mole ratio?

Back

A mole ratio is a ratio that shows the relative amounts of moles of different substances involved in a chemical reaction.

Front

What is the mole ratio of NaCl to H2O in the reaction Na2CO3 + 2 HCl --> 2 NaCl + H2O + CO2?

Back

The mole ratio of NaCl to H2O is 2:1.

Front

How do you find the mole ratio from a balanced equation?

Back

To find the mole ratio, look at the coefficients in front of each substance in the balanced equation.