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【单选题】
下列叙述(NH4)2HPO4溶液的质子条件式中,哪一种说法是正确的?( )
A.
c(H+) + c(H2PO4-) + 2c(H3PO4) = c(OH-) + 2c(NH3) + c(PO43-)
B.
c(H+) + c(H2PO4-) + 2c(H3PO4) = c(OH-) + c(NH3) + c(PO43-)
C.
c(H+) + c(H2PO4-) + 2c(H3PO4) = c(OH-) + 2c(NH3) + 3c(PO43-)
D.
c(H+) + c(H2PO4-) + c(H3PO4) = c(OH-) + c(NH3) + c(PO43-)
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【多选题】which of the following statement describ wholesalers?
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dealing in a limited range of goods
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【单选题】Of the following, which is most likely attributable to the effect of endorphins as described in the passage?
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