StoiChiometry

Balance the chemical equation CH₄ + O₂ → CO₂ + H₂O

CH₄ + 2O₂ → CO₂ + 2H₂O

Balance the chemical equation NaOH + H₂SO₄ → Na₂SO₄ + H₂O

2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O

Identify the reaction type for 2Mg + O₂ → 2MgO

Synthesis reaction

Identify the reaction type for NaOH + HCl → H₂O + NaCl

Acid/Base reaction (neutralization)

Predict the products of Al + CuCl₂ →

2Al + 3CuCl₂ → 3Cu + 2AlCl₃

Predict the products of the complete combustion of propane C₃H₈ + O₂ →

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Using N₂ + 3H₂ → 2NH₃, how many moles of NH₃ can be made from 4.0 moles of H₂?

2.67 mol NH₃

How many moles of CuCl₂ are needed to react with 0.53 mol Al?

0.795 mol CuCl₂

What mass of Cl₂ is needed to react with 20.0 g of Na?

30.9 g Cl₂

How many molecules of BaSO₄ are produced from 18.2 g of Ba(OH)₂?

6.40 × 10²² molecules

How much energy is released when 25 g of NO₂ reacts?

15.2 kJ

Calculate the percent yield when 36.4 g of CaCO₃ produces 38.2 g of CaCl₂.

94.6%