Balancing the following equations:
(a)ag + h2s + o2 = ag2s + h2o4
(b)p4 + o2 = p4o10
(c)pb + h2o + o2 = pb(oh)2
(d)fe + h2o -> fe3o4 + h2
(e)sc2o3 + so3 = sc2(so4)3
(f)ca3(po4)2 + h3po4 = ca(h2po4)2
(g)al + h2so4 = al2(so4)3 + h2
(h)ticl4 + h2o = hcl + tio2

Explanation:

Law of Conservation of mass is defined as mass cannot be created nor be destroyed.In a balanced chemical equation total mass of reactant are equal to the total mass of the products.

In a balanced chemical equation total number of an individual atoms on both sides are same.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.