Chemistry Paper 2 GCSE AQA Foundation Verified Sol
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Chemistry Paper 2 GCSE AQA Foundation Verified Solutions 1. What is the state of balance reached when a chemical reaction and its reverse reaction occur at the same rate? Answer: Equilibrium. 2. What is a substance that speeds up a chemical reaction without being consumed or altered? Answer: A catalyst. 3. What are the approximate percentages of gases in the Earth's atmosphere, respectively? Answer: Oxygen (20%), Nitrogen (79%), Water vapor (1%), and Carbon dioxide (<1%). 4. ...
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Chemistry Paper 2 GCSE AQA Foundation Verified Solutions 1. What is the state of balance reached when a chemical reaction and its reverse reaction occur at the same rate? Answer: Equilibrium. 2. What is a substance that speeds up a chemical reaction without being consumed or altered? Answer: A catalyst. 3. What are the approximate percentages of gases in the Earth's atmosphere, respectively? Answer: Oxygen (20%), Nitrogen (79%), Water vapor (1%), and Carbon dioxide (<1%). 4. ...