Question

What type of reaction is the following?2 HgS (s) —> 2 Hg (0) + S2 (s)synthesis (or combination)single displacementdouble displacementdecompositioncombustion

Answer 1

1) Chemical equation.

`2HgS\rightarrow2Hg+S_2`

2) Types of reaction.

Synthesis. A compound is made from simpler materials.

Single replacement. One element that starts out by itself replaces another element in a compound.

Double replacement. Positive and negative ions in two compounds switch places.

Decomposition. A compound is broken down into simpler compounds.

Combustion. A compound containing Carbon and Hydrogen combines with Oxygen gas and produces carbon dioxide and water.

3) The chemical equation above is a decomposition.