A catalyst -

a. causes a reaction.

b. increases a reaction's rate.

c. has no effect on a reaction.

d. raises the temperature for a reaction.

Which of these statements best explains how fossil records provide evidence to the scientific theory of evolution? A. They show how natural selection happened on Earth by chance. B.

if two objects at different te, peraure are in contact with each other what happens to their temperature

If element X has 67 protons, how many electrons does it have?

What's a wind up toy useful energy output

g A mixture of gases contains 6.46 g of N2O, 2.74 g of CO, and 5.40 g of O2. If the total pressure of the mixture is 4.33 atm, what is the partial pressure of each component? a) P (N2O) = 0.635 atm, P (CO) = 0.424 atm, and P (O2) = 3.27 atm.

What are the two main systems we use for describing acids and bases?

Why do polar covalent bonds form?

What are some conditions that might control deposition

What are four basics states of matter

For beta radiation, what stops its penetrating abilities? aluminum a piece of paper skin thin fabric