Which of the following is a chemical change?
Folding a piece of paper
Cutting a piece of pa...
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Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?
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How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.
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What mass of natural gas (ch4) must you burn to emit 276 kj of heat?
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