Nh4+ + h2o -> nh3 + h3o
which is an acid-conjugate base pair?
a nh4+ and nh3
b nh4+ and h3o+
c h2o and nh3
d h2o and h3o
copper metal (cu) reacts with silver nitrate (agno3) in aqueous solution to form ag and cu(no3)2. an excess of agno3 is present. the balanced chemical equation is shown below.
cu + 2agno3 -> cu(no3)2 + 2ag
the molar mass of cu is 63.5 g/mol. the molar mass of ag is 107.9 g/mol. what mass, in grams, of ag is produced from reaction of 31.75 g of cu?
a 26.95
b 107.9
c 215.91
d 431.82
which is the best example of water regulating an organism’s body temperature?
a a jogger sweating after a run
b a fish passing water over its gills
c a deer taking a drink from a stream
d a leaf using water for photosynthesis

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