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3 Cards in this Set
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- Back
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what is the law of conversation of mass? |
mass is neither created or destroyed |
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what is the law of definite proportions what is the law of multiple proportions? |
law of multiple proportiona ia that when 2 elements A and B form 2 different compounds the masses of the element B that combine with a fixed mass of A can be expressed in small whole numbers. For example when you have atoms of C and O it can produce 2 compounds CO and CO2. Carbon has a fixed mass of 1g and to make CO, 1.33g of O is needed and to make CO2, 2.67g of O is needed. The big number is divided by the small number 2.67/1.33 to give a small whole number of 2. Law of definite proportions is that in any given compound always has the same proportion of its constituent elements by mass. For example, water has a mass of 18g in which 2g is hydrogen and the remaining 16 is oxygen. When the bigger number, 16 is divided by the smaller 2, the answer is 8. This can be put into a ratio former 8:1 of oxygen to hydrogen atoms. This ratio is the same for ALL pure water, regardless of how much you have. |
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give the atomic mass and charge of both the proton and electron |
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