If red spheres represent oxygen atoms, blue spheres represent nitrogen atoms, and all the molecules are gases,

c. indicate the type of reaction as combination, decomposition, single replacement, double replacement, or combustion.

If purple spheres represent iodine atoms, white spheres represent hydrogen atoms, and all the molecules are gases,

a. write the formula for each of the reactants and products.

If purple spheres represent iodine atoms, white spheres represent hydrogen atoms, and all the molecules are gases,

b. write a balanced equation for the reaction.

If purple spheres represent iodine atoms, white spheres represent hydrogen atoms, and all the molecules are gases,

c. indicate the type of reaction as combination, decomposition, single replacement, double replacement, or combustion.

Identify the type of reaction for each of the following as combination, decomposition, single replacement, double replacement, or combustion:

d. Zinc replaces copper in Cu(NO₃)₂.

Propane gas, C₃H₈, undergoes combustion with oxygen gas to produce carbon dioxide and water gases. Propane has a density of 2.02 g/L at room temperature.

a. Write the balanced chemical equation.

The equation for the formation of silicon tetrachloride from silicon and chlorine is

Si(s) + 2Cl₂(g) → SiCl₄(g) + 157 kcal

b. Is the energy of the product higher or lower than the energy of the reactants?

Consider the following unbalanced equation:

Al(s) + O₂(g) → Al₂O₃(s)

b. Identify the type of reaction.

Ammonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil.

a. How many formula units are in 0.200 mole of ammonium sulfate?

Ammonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil.

b. How many H atoms are in 0.100 mole of ammonium sulfate?

Ammonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil.

c. How many moles of ammonium sulfate contain 7.4 × 10²⁵ atoms of N?