The Earth's atmosphere is made up of approximately

__

% nitrogen.

A. 1

B. 21

C. 78

D. none of the above

To measure the mass of a vitamin tablet, use: liters (L) kilograms (kg) milligrams (mg) millimeters (mm)

What is the ph of a solution made by mixing 25.00 ml of 0.100 m hcl with 40.00 ml of 0.100 m koh? assume that the volumes of the solutions are additive. what is the ph of a solution made by mixing 25.00 ml of 0.100 m hcl with 40.00 ml of 0.

If a neutrally charged atom looses one or more electron what happens to its its overall charge

What is the mass most similar to

The reason radioactive isotopes can be followed through the steps of a chemical reaction or industrial process is that they a. are stable. b. give off radiation. c. do not react chemically as nonradioactive isotopes do. d. do not decay.

Which metal is more active than tin, but less active than zinc

Why does the amount of energy available change as you move from one trophic level to the next?

What type of bond holds metal atoms together?

Imagine you are purifying a protein which accounts for 0.001% of the total protein within a cell. how many steps of purification are required to yield pure protein, assuming a 10 fold purification with each step of purification?

If an object has the mass of 109.67 g and a volume of 16.99 cm3 what's its density