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Water at 29.0 °C is sprayed onto 0.188 kg of molten gold at 1063 °C (its melting point).
The water boils away, forming steam at 100.0 °C and leaving solid gold at 1063 °C.
What is the minimum mass of water that must be used?
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At rest, a person inhales 9.72*10^21 nitrogen molecules in an average breath of air. How many mole of nitrogen atoms are inhaled? (Hint: in air, nitrogen occurs as a diatomic molecule)
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