This formula equation is unbalanced. Pb open paren NO sub 3 close paren sub 2 aq plus Li sub 2 SO sub 4 aq rightarrow PbSO sub 4 times s plus LiNO sub 3 times aq Which coefficient should appear in front of LiNO sub 3 in the balanced equation?

Balance the nitrate groups first. Pb(NO₃)₂ contains two nitrate groups, so the products need 2 LiNO₃ to contain the same two nitrate groups. That also gives two lithium atoms, matching Li₂SO₄. The coefficient in front of LiNO₃ is 2, choice B.

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