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Year 8 Homework 19/1/22 OALH
By Xenia Bennett
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Last updated over 4 years ago
12 questions
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Question 1
1.
What are the reactants in combustion
Question 2
2.
What are the products of complete combustion
Question 3
3.
What are the products of incomplete combustion?
Question 4
4.
Question 5
5.
Write the word equations for the complete and incomplete combustion of methane
Challenge question.
Question 6
6.
Write the symbol equations for the complete and incomplete combustion of methane
Question 7
7.
Question 8
8.
The mass of reactants at the start of a reaction are 15g. What are the mass of product?
Question 9
9.
2 g of sodium react with 3g of oxygen. The product is sodium oxide. What is the mass of sodium oxide?
Question 10
10.
Question 11
11.
10g of aluminium react with oxygen forming 17g of aluminium oxide.
What was the mass of oxygen?
Question 12
12.
15g of carbon react with oxygen forming 45g of carbon dioxide..
What was the mass of oxygen?
Complete combustion occurs when…
a fuel is burnt in excess oxygen.
a fuel is burnt without enough oxygen
a fuel is burnt without enough air.
The mass of reactants before a reaction is…
More than the mass of products
Less than the mass of products
The same as the mass of products
What happens to the atoms in a chemical reaction?
Atoms add together and make something bigger
Atoms in the reactants are rearranged to form the products.
Atoms in the reaction mix together and mass is lost