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. When 100 g of a liquid A at 100ºC is added to 50 g of a liquid
B at temperature 75°C, the temperature of the mixture
becomes 90°C. The temperature of the mixture, if 100 g of
liquid A at 100ºC is added to 50 g of liquid B at 50°C will be
(b) 80°C (c) 70°℃
(d) 85°C
(a) 60°C

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