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Description
Flashcards by Paige Louise, updated more than 1 year ago
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Created by Paige Louise
almost 6 years ago
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| Question | Answer |
| State the law of conservation of mass | In a chemical reaction, the total mass of the products is equal to the total mass of the reactants |
| Why must a symbol equation balance? | Mass is conserved because no atoms are made or lost |
| Calculate the relative formula mass of water (h20) | h=1 o=16 1+1+16=18 Mr=18 |
| Calculate the relative formula mass of calcium carbonate (CaCO3) | Ca=40 C=12 O=16 16+16+16+12+40=100 Mr=100 |
| When iron is burned, iron oxide is produced and the mass of the solid increases. why does the mass of the solid increase? | The mass of the solid increases because when the iron is burned, it combines with the oxygen and the oxygen has mass |
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