Which has the higher percentage of aluminum, Al2O, or Al(NO3)3
1 answer:
Al₂O has a higher percentage of aluminium.
Explanation:
To solve this problem, we have to compare the molar mass of the aluminium in each compound to one another as percentage of the whole compound:
Molar mass of Al₂O = 2(27) + 16 = 70g/mol
Molar mass of Al(NO₃)₃ = 27 + 3[14 + 3(16)] = 213g/mol
Percentage by mass of Al in Al₂O = x 100 = 77%
Percentage by mass of Al in Al(NO₃)₃ = x 100 = 12.7%
Al₂O has a higher percentage of aluminium.
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The new volume of the balloon be .
Explanation:
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Initial volume is 556 cm ³
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The Charles law states that at constant pressure, the volume of gas is directly proportional to its temperature i.e.
, P is constant
So, the new volume of the balloon be .