The change in isotopes over time due to the emission of radioactive particles is known as

A. absolute-age dating.

B. half-life.

C. radiometric dating.

D. radioactive decay.

Equilibrium is established in a reversible reaction when:

What is a characteristic of a solution

A piece of magnesium ribbon reacts with hydrochloric acid to produce magnesium chloride. what is the empirical formula of the compound, that is 25.3% magnesium and 74.7% chlorine.

How many grams of o2 are required to produce 358.5 grams of zno?

Which of these statement is conclusive evidence that mixing sugar in water is a physical change? A). there is no change in color B). there is no precipitate formed. C). there is no gas given off. D). there is no molecular change.

What type of reaction takes place when atoms or molecules rearrange to form new substances?

If you pump air into cycle tyre a slight warming effect is noticed at valve stem why

Butter is melted in a pan. Which of the following is true about the change? A. It is a physical change that releases energy B. It is a chemical change that absorbs energy C. It is a physiscal change that absorbs energy D.

Describe how secondary consumer is dependent on the sun for its energy

What % of the ideal soil is air?