After the death of living material, the ratio of carbon-12 to carbon-14 isotopes in the material;

1. increases

2. decreases

3. remains the same

Which of the following is altered by a catalyst? A. difference between the energies of products and reactants B. average kinetic energy of products C. average kinetic energy of reactants D. activation energy

Methylhydrazine, CH6N2, is commonly used as a liquid rocket fuel. The heat of combustion of methylhydrazine is - 1.30 * 103 kJ/mol. How much heat is released when 202.7 g of methylhydrazine is burned

The hydrogen atom of one water molecule bonds with the oxygen atom of another water molecule. What is this bond referred to as? a. Hydrogen bond b. Covalent bond c. Ionic bond

What should be in an analysis for a lab report

A gas occupies 1.56L at 1.00 atm. What will be the volume of this gas if the pressure becomes 3.00 atm

If the caffeine concentration in a particular brand of soda is 2.85 mg/oz, drinking how many cans of soda would be lethal? Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.

Suppose that your favorite AM radio station broadcasts at a frequency of 1600 kHz. What is the wavelength in meters of radiation from the station? (Hint: convert kHz to Hz and find frequency first.)

Reaction rate lab report

The absence of which cell structure would indicate a cell is prokaryotic?

When 0.880 g of an organic compound containing carbon, hydrogen and oxygen is burned completely in oxygen, 1.760 g of co2 and 0.720 g h2 o are produced. what is the empirical formula of the compound?