4. Identify which of the following are oxidation-reduction reactions. If a reaction is a redox reaction,
name the element oxidized and the element reduced.
a. Mg(s) + Br_(n) β MgBr_(s)
b. H2CO3(aq) β H2O(l) + CO2(g)
c. CaCO3(s) + 2HCl(aq) β CaCl (aq) + H2O(1) + CO2(g)
d. CuOls) + H2(g) β Cu(s) + H2O(1)
e. Li(s) + H2O11 - LiOH(aq) + H2(g)
f. NaCl(aq) + AgNO3(aq) β NaNO3(aq) + AgCl(s)
g. HgO(s) β Hg(l) + O2(g)
h. P.(s) + O2(g) β P,0,0(s)
i. C3H2(g) + O2(g) β CO2(g) + H2O(g)
j. Al(s) + HCl(aq) β AICI (aq) + H2(g)
Answers: 3
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