HELP!

2006-12-23 6:24 pm
the empirical formula for a compound containing 3.1% of hydrogen, 31.6%of phosphorus
and 65.3%of oxygen by mass is
A : HPO2
B : H3PO2
C : H3PO3
D : H3PO4
請詳細列明step! thx a lot!

回答 (2)

2006-12-23 6:45 pm
✔ 最佳答案
% of oxygen: 100%-3.1%-31.6%=65.3%

%除以relative atomic mass of H: 3.1/1=3.1
%除以relative atomic mass of P: 31.6/31=1.0
%除以relative atomic mass of O: 65.3/16=4.1

用最細個數(1.0)去除:
H: 3.1/1.0=~3
P: 1.0/1.0=1
O: 4.1/1.0=~4

所以D : H3PO4
2006-12-23 6:54 pm
Ans:(D)
because
H:P:O=3.1/1:31.6/30:65.3/16=3.1:1.02:4.08
=3.1/1.02:1.02/1.02:4.08/1.02=3:1:4
→H3PO4


收錄日期: 2021-04-23 16:28:41
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