How many electrons are present in 4He2+?

1. 6

2. 4

3. 1

4. 2

5. 0

6. None of these

7. 3

8. 5

A child has a balloon in his house in the air conditioning. He goes outside with the balloon on a hot day. What happens to the temperature of the gas and volume of the balloon?

How did rutherford know that the nucleus was positively charged?

Determine the value of x and write the complete chemical formula of the hydrate

What is the exact mass of one mole of carbon-12 atoms

The unburned, unfiltered fuel parts that remain to be removed through the exhaust are called a. sulfuric acid emissions. b. petroleum bases. c. hydrocarbons. d. carbon dioxide emissions.

Do pure substances have the same chemical and physical properties

How is matter conserved in a chemical reaction

Define Percent transmittance

Express (3 x 104) (4 x 1023) in scientific notation

The theoretical yield of aspirin in a reaction is 721 g. What is the percent yield if 461 g is produced?