Find the mass of 3 moles of oxygen gas.
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First, oxygen molecules are diatomic. Secondly, molar masses are in grams and will never be as big as 5.78x10^25 grams (unless you're talking about stars or the like).
To find the answer, we look at the periodic table, specifically at oxygen. We see that the atomic weight is 15.999grams/mole. Next, we calculate the molar weight of oxygen (diatomic, remember). This means we have to double 15.999g/mole. Thus, diatomic oxygen is 32g/mole. Three moles is 96g.
To find the answer, we look at the periodic table, specifically at oxygen. We see that the atomic weight is 15.999grams/mole. Next, we calculate the molar weight of oxygen (diatomic, remember). This means we have to double 15.999g/mole. Thus, diatomic oxygen is 32g/mole. Three moles is 96g.
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