HN Midterm Review #3

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product formed.

Front

How do you determine the limiting reactant in a reaction?

Back

To determine the limiting reactant, calculate the moles of each reactant, then use stoichiometry to find which reactant produces the least amount of product.

Front

What is the balanced equation for the combustion of B2H6?

Back

B2H6 + 3O2 -> 2HBO2 + 2H2O.

Front

What is the molar mass of O2?

Back

The molar mass of O2 is 32 g/mol.

Front

How do you calculate the mass of a reactant needed in a reaction?

Back

Use the balanced chemical equation to find the mole ratio, then convert moles to grams using the molar mass.

Front

What is a cation?

Back

A cation is an ion with a positive charge, formed when an atom loses one or more electrons.

Front

What is the molar mass of CH4?

Back

The molar mass of CH4 (methane) is approximately 16 g/mol.

Front

What is the role of water in the reaction CH4 + 2H2O -> CO2 + 4H2?

Back

Water acts as a reactant that helps in the conversion of methane to carbon dioxide and hydrogen.

Front

How do you find the number of neutrons in an atom?

Back

The number of neutrons can be found by subtracting the atomic number (number of protons) from the atomic mass.

Front

What is the atomic mass of an element?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).