What are all living things made up of

Calculate the ratio of effusion rates of cl2 to f2.

a 160 milligram sample of a radioactive isotope decays to 10 kilograms in 12 years. what is the half life of this element

How many moles of ethane (C2H6) would be needed to react with 62.3 grams of oxygen gas? Unbalanced equation: C2H6 + O2 → CO2 + H2O Show, or explain, all of your work along with the final answer.

Which statement correctly explains the molecular structure of water? A) One oxygen and two hydrogen atoms are joined by a covalent bond. B) One hydrogen and two oxygen atoms are joined by a covalent bond.

A molecule of any organic compound has at least one 1. ionic bond 2. double bond 3. oxygen atom 4. carbon atom

Why can't you add single atoms of what you need to either side of the arrow?

how much heat in joules would be required to raise the temperature of 40 g of aluminum (CAL =.21 cal g/C) from 19. c to 31.2 c

How do you calculate wavelength?

What are the isomers of C4H8F2?

Which statement explains the cleaning action of soap on greasy dishes? Which statement explains the cleaning action of soap on greasy dishes? The soap hydrates the grease with its polar head groups and holds it in suspension.