Conservation of mass and balanced equations: 4.3.1 Chemical measurements, conservation of mass and the quantitive interpretation of chemical equations: Chemistry AQA Q&A: GCSE (9:1)

2, 3, 2

What are the numbers needed to balance this equation?

__Al + __Cl₂ --> __AlCl₃

1, 2, 1, 1

What are the numbers needed to balance this equation?

__Ca + __H₂O --> __Ca(OH)₂ + __H₂

2, 1, 2

What are the numbers needed to balance this equation?

__Na + __F₂ --> __NaF

1, 3, 2, 3

What are the numbers needed to balance this equation?

__Al₂(SO₄)₃ + __Ca(OH)₂ --> __Al(OH)₃ + __CaSO₄

2, 1, 2, 1

What are the numbers needed to balance this equation?

__Na + __MgF₂ --> __NaF + __Mg

2, 1, 2, 1

What are the numbers needed to balance this equation?

__LiCl + __Mg(NO₃)₂ --> __LiNO₃ + __MgCl₂

2, 3, 3, 2

What are the numbers needed to balance this equation?

__Al + __Cu(NO₃)₂ --> __Cu + __Al(NO₃)₃

4, 3, 2

What are the numbers needed to balance this equation?

__Fe +__O₂ --> __Fe₂O₃

one molecule of water is made for every two molecules of HCl that react

The equation below shows the reaction between calcium oxide and hydrochloric acid:

CaO + 2HCl → CaCl₂ + H₂O

What is true about the reaction? (ratio)

C₆H₁₄

Which is the missing formula in this reaction?

C₁₀H₂₂ → C₄H₈ + _____________

3, 4

What should be the missing numbers in front of CO₂ and H₂O in this equation?

C₃H₈ + 5O₂ → __CO₂ + __H₂O

C₆H₁₄ + 2C₃H₆

Cracking of hydrocarbons is a reaction that can produce a range of products. If one molecule of dodecane (C₁₂H₂₆) was cracked, which could be the products?

C₁₂H₂₆ → ?

CaCO₃

random formulae