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Provocator
@Provocator
April 2021
1
25
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Визначити масові частки елементів в сполуках
1.Al2O3
2.Al(OH)3
3/NO2-HNO3
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Answers & Comments
shevchenko0001
Mr ( Al2O3) = 27*2 +16*3 = 54 +48 = 102
w (Al) = 54: 102 = 0,52 = 52 %
w(O) = 0?48 = 48 %
Mr (Al(OH)3 ) = 78
w(Al) = 0,35 =35 %
w( H) =0,04 =4%
w (O) = 0,61 = 61 %
2 votes
Thanks 1
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Answers & Comments
w (Al) = 54: 102 = 0,52 = 52 %
w(O) = 0?48 = 48 %
Mr (Al(OH)3 ) = 78
w(Al) = 0,35 =35 %
w( H) =0,04 =4%
w (O) = 0,61 = 61 %