Unit 3 Part 2 Review

Front

What is the ratio of moles of MgO to moles of Fe in the reaction 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe?

Back

3 mol MgO / 2 mol Fe

Front

Where are the numbers for a mole ratio found?

Back

They are found as coefficients in the reaction's balanced chemical equation.

Front

What is the formula for hydrochloric acid?

Back

HCl

Front

What are the numbers needed to balance the equation?

Back

2, 7, 6, 4

Front

In the reaction 2H2 + O2 → 2H2O, how many moles of oxygen are consumed if 8 moles of H2 are used?

Back

4 moles of O2

Front

What is a mole in chemistry?

Back

A mole is a unit that measures the amount of substance, defined as exactly 6.022 x 10^23 particles.

Front

What does the coefficient in a balanced chemical equation represent?

Back

The coefficient represents the number of moles of each substance involved in the reaction.

Front

What is the balanced equation for the combustion of methane (CH4)?

Back

CH4 + 2 O2 → CO2 + 2 H2O

Front

How do you determine the limiting reactant in a chemical reaction?

Back

The limiting reactant is the substance that is completely consumed first, limiting the amount of product formed.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures the conservation of mass, meaning the number of atoms of each element is the same on both sides.