Evidence of Chemical Reactions

Question 1

Electrolysis breaks down water to form hydrogen and oxygen gas. The word equation that represents this reaction is: water

Revolt · Accepted Answer

hydrogen + oxygen.

Question 2

A bright light is produced when magnesium reacts with the oxygen in air to form magnesium oxide. The word equation that represents this reaction is: magnesium + oxygen

Revolt · Accepted Answer

magnesium oxide.

Question 3

When methane burns, it reacts with oxygen to produce water and carbon dioxide. The word equation that represents this reaction is: methane + oxygen

Revolt · Accepted Answer

carbon dioxide + water

Question 4

Propane burns in oxygen to produce carbon dioxide and water. What are the chemical formulas of the reactants and products?

Revolt · Accepted Answer

The formulas of the reactants are C3H8 and O2. The formulas of the products are CO2 and H2O.

Question 5

What do the symbols tell you about the conditions of the reaction shown to the right? Check all of the boxes that apply.

Revolt · Accepted Answer

The reactant is dissolved in water.; A gas and a liquid are produced.

Question 6

2H2(g) + O2(g) → 2H2O(g)

Revolt · Accepted Answer

3 2H2(g) + O2(g) → 2H2O(g)

Question 7

2H2(g) + O2(g) → 2H2O(g)

Revolt · Accepted Answer

3 2H2(g) + O2(g) → 2H2O(g)

Question 8

How do balanced chemical equations show the conservation of mass?

Revolt · Accepted Answer

They show that the number of atoms of each element is the same in the products and reactants.

Question 9

In level 1, you balanced the equation N2 + H2 → NH3. What number did you place in front of ammonia (NH3)?

Revolt · Accepted Answer

2

Question 10

What is the chemical equation for the burning of propane if all the products and reactants are in the gas phase?

Revolt · Accepted Answer

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)

Evidence of Chemical Reactions Answers

More from this Course

TRY EDGENUITY HACKS