If you have 222 g of radioisotope with a half-life of 5 days, how much isotope would remain after 15 days?

b. what percentage of a radioactive isotope would remain after four half-lives?

Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are formed when 57.1 grams of sodium are added to water?

Why lead carbonate is not reacted with sulphuric acid in the formation of carbon dioxide

A passager plane is flying above ground. Discraibe the two compontents of it mechanical energy

Which wave can be transmitted through empty space

Which property of fossil fuel make them an important resource for life on earth

Burning wood represents a chemical change. True or False?

Why are phosphates in laundry detergent

What is the name of the scientist who discovered the electron

Which of these is not a covalent molecule? 1. F2 2. CO 3. LiF 4. NH3

Define buffer capacity. a. buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness. b. buffer capacity is the amount of acid that can be added until all of the base is used up. c.