Chemistry, 14.07.2021 15:50 magaaalimartinez
QUESTION 3 The reaction of nitrogen and hydrogen proceed as follows: N2(g) + 3H2(g) → 2NH3 (9) If the rate of nitrogen at a particular instant in a reaction vessel is 4.2 x 10-3 mol L-15-1 what is the rate of disappearance of H2.?
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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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One similarity and one difference between an element and a mixture of elements
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QUESTION 3 The reaction of nitrogen and hydrogen proceed as follows: N2(g) + 3H2(g) → 2NH3 (9) If th...
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