Which of these has an exoskeleton?

a. tree

b. deer

c. elephant

d. crab?

Calculate the number of moles in 2.4g of carbon

A chemistry student needs of isopropenylbenzene for an experiment. She has available of a w/w solution of isopropenylbenzene in carbon tetrachloride. Calculate the mass of solution the student should use.

Nitrogen dioxide gas is obtained by the reaction of nitrogen monoxide gas and oxygen gas. Write a balanced chemical equation for this reaction?

What is the pressure exerted by 0.500 mold sample of nitrogen in a 10.0 L container at 20 degrees Celsius

Common commercial acids and bases are aqueous solutions with the following properties: Density Mass Percent of Solute Hydrochloric acid 1.19 38 Nitric acid 1.42 70. Sulfuric acid 1.84 95 Acetic acid 1.05 99 Ammonia 0.

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.

How many moles of oxygen react with 0.23 moles of NH3

How many moles of carbon do you have in 100 quadrillion carbon atoms? report answer to 2 sig figs