Stoichiometry-moles/moles and mass/mass

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

True or False: You must convert grams to moles to do stoichiometry.

Back

True

Front

What is the mole concept?

Back

The mole is a unit of measurement in chemistry that represents 6.022 x 10²³ particles (atoms, molecules, ions, etc.).

Front

In the reaction 2H₂ + O₂ → 2H₂O, how many moles of water are produced from 2 moles of oxygen?

Back

4 moles of water.

Front

What is the molar mass of water (H₂O)?

Back

The molar mass of water is approximately 18 g/mol.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol).

Front

In the reaction 2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂, how many grams of aluminum sulfate are produced from 250g of H₂SO₄?

Back

290 g of aluminum sulfate.

Front

What is the balanced equation for the reaction of sodium with water?

Back

2Na + 2H₂O → 2NaOH + H₂.

Front

How many grams of hydrogen are produced from 120 g of sodium in the reaction 2Na + 2H₂O → 2NaOH + H₂?

Back

5.2 g of hydrogen.

Front

In the reaction 2H₂ + O₂ → 2H₂O, how many moles of water can be produced from 8 moles of hydrogen?

Back

8 moles of water.