convert 1.248×1010 g to each of the following units.
a) kg express your answer using four sign...
Chemistry, 14.09.2019 07:10 calebbailey2318
convert 1.248×1010 g to each of the following units.
a) kg express your answer using four significant figures.
b) mg express your answer using four significant figures.
c) mg express your answer using four significant figures.
d) metric tons (1 metric ton = 1000 kg) . express your answer using four significant figures.
Answers: 2
Chemistry, 22.06.2019 11:40
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.)
Answers: 1
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