Chemistry, 06.07.2021 16:40 exoticbunnylover123
g Suppose you heat a metal object with a mass of 32.8 g to 96.1 oC and transfer it to a calorimeter containing 100.0 g of water at 17.4 oC. The water and metal reach a final temperature of 24.0 oC. What is the specific heat of the metal in cal/g-oC?
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Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
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g Suppose you heat a metal object with a mass of 32.8 g to 96.1 oC and transfer it to a calorimeter...
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