Mole to Mole

Front

What does it mean when a substance is diatomic?

Back

A diatomic substance consists of two atoms, which can be the same or different. For example, chlorine (Cl2) is diatomic because it exists as pairs of chlorine atoms.

Front

In the reaction N2 + 3H2 → 2NH3, how many moles of hydrogen are needed to react with 1 mole of nitrogen?

Back

3 moles of hydrogen are needed to react with 1 mole of nitrogen.

Front

What is the molar ratio of nitrogen to hydrogen in the reaction N2 + 3H2 → 2NH3?

Back

The molar ratio is 1:3, meaning 1 mole of nitrogen reacts with 3 moles of hydrogen.

Front

What is the correct name for MgCl?

Back

Magnesium Chloride.

Front

In the reaction 2 Mg + 1 Cl2 → 2 MgCl, how many moles of magnesium chloride are produced from 1 mole of Cl2?

Back

2 moles of magnesium chloride are produced from 1 mole of Cl2.

Front

How many moles of Cl2 are required to produce 1 mole of MgCl?

Back

0.5 moles of Cl2 are required to produce 1 mole of MgCl.

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule. For example, in H2O, the subscript '2' indicates there are two hydrogen atoms.

Front

How do you calculate the number of moles needed in a chemical reaction?

Back

Use the coefficients from the balanced chemical equation to determine the mole ratios between reactants and products.

Front

What is the molar mass of chlorine (Cl)?

Back

The molar mass of chlorine is approximately 35.45 g/mol.

Front

If you have 2 moles of N2, how many moles of H2 are needed?

Back

6 moles of H2 are needed to react with 2 moles of N2.