Question

Determine the reaction type for this chemical equation:

2HgO → 2Hg + O2


decomposition

double replacement

synthesis

single replacement

combustion
Question at position 7
7

Fill in the Blank
4 points



Question at position 7
Balance the following single replacement reaction:

Question Blank 1 of 4
type your answer...
K(s) + Question Blank 2 of 4
type your answer...
MgBr2(aq) → Question Blank 3 of 4
type your answer...
KBr(aq) + Question Blank 4 of 4
type your answer...
Mg(s)

Answer 1

1) 2HgO → 2Hg + O2 is a decomposition reaction.

2) Balanced single-replacement equation:
2 K(s) + MgBr2(aq) → 2 KBr(aq) + Mg(s)

(So the coefficients are 2, 1, 2, 1.)