Evidence of Chemical Reactions

Question 1

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 2

Which equation obeys the law of conservation of mass?

Revolt · Accepted Answer

2H2(g) + O2(g) → 2H2O(g)

Question 3

In level 3, you balanced the equation NH3 + O2 → NO2 + H2O. What number did you place in front of water?

Revolt · Accepted Answer

6

Question 4

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 5

In level 2, you balanced the equation C + H2O → CH4 + CO2. What number did you place in front of carbon dioxide (CO2)?

Revolt · Accepted Answer

1

Evidence of Chemical Reactions Answers