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8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.
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State one important difference between a physical change and a chemical change?
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What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced
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Assuming tea leaves contain 5.0% caffeine by weight what is the maximum weight of caffeine you could...
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