How much of a radioactive parent isotope will remain after three half-lives have passed?

a. one-eighth

b. three-halves

c. one-third

d. one-sixth?

How much is 100 g on mg

Calcium reacts with hydrochloric acid, HCI, to make calcium chloride and hydrogen gas (H2). 1) write a word equation for this reaction. 2) write a balanced symbol equation for this reaction.

During the process of (what) substances are spread through a gas or liquid

Which of the following statements about nuclear reactions is true? They do not follow Einstein's equation since no changes in mass or energy occur. They follow the law of conservation of energy only. They follow the law of conservation of mass only.

Which of the following is equal to 2.3 cm3? 2.3 x 10-3 m3 2.3 x 10-3 dm3 2.3 x 10-2 m3 2.3 x 10-6 dm3

7) change 21.1 mg into grams

Why is an ionic solution a good conductor of electricity while a covalent solution is a poor conductor

How many grams of zinc metal will react completely with 8.2 liters of 3.5 M HCl? Show all of the work needed to solve this problem. Zn (s) + 2 HCl (aq) ZnCl2 (aq) + H2 (g)

The notation for the nuclide 13755Cs gives information about (1) mass number, only (2) atomic number. only (3) both mass number and atomic number (4) neither mass number nor atomic number

Which is an example of pure chemistry