Testing for gases. A student came to me and asked what were the tests for gases. She had had a school lesson but hadn't done or seen a demo. We tested for oxygen, hydrogen, carbon dioxide and Chlorine. She now knows the tests.
1:1 Private Teaching in a dedicated classroom
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Social Stratification – How Class Shapes Opportunity
Social Stratification – How Class Shapes Opportunity Social stratification refers to the way society is structured into layers, with uneq...
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