An isotope of cesium (cesium-137) has a half-life of 30 years if 1.0g of cesium-137 disintegrates over a period of 90 years how many g of celsium-137 would remain

What's compound streak mean in science

My Everest is 29035 feet above sea level Mr. Kilimanjaro is 9700 feet lower how high is Mr. Kilimanjaro

Describe an example of heat being transferred from a warmer object to a cooler object without both objects touching.

There are two opposing processes that occur in a solution in contact with undissoved solute. These are dissolving ___ a. supersaturation; b. hydration; c. crystallization; d. solvation

Name the 2 fractions of petroleum which are used as fuel. Explain.

Which of the following gases in Earth's atmosphere would you expect to find as molecules and which as individual atoms? a. Nitrogen b. Oxygen c. Argon

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as (1) an ionic compound (2) a molecular compound (3) a metal (4) a nonmetal

What is done with the reactive sodium after the reaction to make sure the products are safe in an air bag?

Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

Reactions cannot occur without a certain minimum amount of energy. what is this minimum amount of energy called?