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Can someone me with 3 and 4 plz. this is for masteries test.
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Chemistry, 22.06.2019 23:30
Match each statement with the state of matter it describes
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Chemistry, 23.06.2019 02:50
Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ
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130 cm^3 of a gas at 20°C exerts a pressure of 750 my He. Calculator its pressure if its volume is i...
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