Which product (if any) will form a precipitate in the following reaction? K2SO4(aq) + Pb(NO3)2(aq) --> 2KNO3 + PbSO4

a. K2SO4
b. PbSO4
c. KNO3
d. No Precipitate formed

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

What is the correct lewis structure for chloroform chcl3

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same