Which of the following pairs of reactants will react together to produce water (h2o) as one of the products? fe(oh)3 and cuo cu(oh)2 and h2s mgo and ca(oh)2 so3 and h2o based on reactivity, which of the following elements can replace aluminum (al) in a compound during a single replacement reaction? b ca zn fe

1. Option (b) is the correct answer.

              2. Option (b) is the correct answer.

Explanation:

1. The reaction between the given reactants will be as follows.

(a)

(b)

(c)

(d)

Thus, out of the given options, the reaction results in the formation of water.

2.  Base on reactivity series, the reactivity of some metals in the decreasing order is as follows.

                  K, Na, Ca, Mg, Al, Zn, Fe

Whereas B is a metalloid so, it will have properties of both metals and non-metals. Thus, boron (B) will also be less reactive than Al.

Therefore, out of the given options, Ca is more reactive than Zn and Fe.

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products