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How many grams of aluminum will there be in 98g of al2o3?
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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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Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.
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Hydroelectric energy is inexhaustible true or false...
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