URGENT
The equation H3PO4+3KOH -> K3PO4+3H20 is an example of which type of reaction?
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Chemistry, 21.02.2020 23:51 natalie2sheffield
URGENT
The equation H3PO4+3KOH -> K3PO4+3H20 is an example of which type of reaction?
(A) Double Replacement
(B) Decomposition
(C) combination
(D) Single Replacement
Answers: 2
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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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