Which of the following is not a redox reaction?
a. h2o(l) + nh3(g) latex: \longrightarrow nh4+(aq) + oh–(aq)
b. 2h2(g) + o2(g) latex: \longrightarrow 2h2o(l)
c. zn(s) + h2so4(aq) latex: \longrightarrow znso4(aq) + h2(g)
d. feso4(aq) + k2cr2o7(aq) + 7h2so4(aq) latex: \longrightarrow cr2(so4)3(aq) + 3fe2(so4)3(aq) + k2so4(aq) + 7h2o(l)
e. cl2(g) + 2kbr(aq) latex: \longrightarrowbr2(l) + 2kcl(aq)

What effect does a decrease in temperature have on the overall rate of a chemical reaction? a decrease in temperature decreases . the reaction rate will

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)