During a single-replacement reaction, a more-active metal will replace a less-active metal in a compound. Which single-replacement reaction will occur? Ni will replace Fe in a compound. Al will replace K in a compound. Mg will replace Ag in a compound. Ca will replace Li in a compound

Mg will replace Ag in a compound

Explanation:

A single replacement reaction is driven by the position of ions on the activity series.

As a rule of thumb, the position of metal ions on the activity series determines their reactivity.

Metal ions that are above another are more reactive and they will displace those that are lower.

Generally, activity increases as we go up the group.

Mg ions are higher than Ag ions on the series so, Mg will displace Ag from a solution.

28. evolution

29. environment, survive, offspring  

explanation:

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate