661.
A.
1.5
B.
1.4
C.
4.1
D.
5.1
Correct answer is C
The ratio of permanent to temporary hardness will be 20:(20 - 15) = 20:5 = 4:1
662.
A.
SO2-OH -
B.
K + and SO 4 2-
C.
OH and HO
D.
H3O + and K
Correct answer is A
No explanation has been provided for this answer.
663.
A.
51.5
B.
45.5
C.
34.5
D.
26.5
Correct answer is C
No explanation has been provided for this answer.
664.
A.
A
B.
B
C.
C
D.
D
E.
E
Correct answer is D
No explanation has been provided for this answer.
665.
A.
2-butanone
B.
2-butanal
C.
butane
D.
butanoic acid
E.
3-butanal
Correct answer is A
No explanation has been provided for this answer.
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