The chemical standard for the quantity of a mole is based on which substance?

Earthquakes occur along the San Andreas Fault in California. Which statement best describes plate motion in that area during the time between earthquakes? a. Plate motion stops; stress and potential energy between the plates decrease. b.

Are viruses alive? discuss why or why not.

Which units describe the molarity of an aqueous sucrose solution? moles of sucrose per liter of solution grams of solution per liter of solution moles of sucrose per mole of water grams of sucrose per mole of sucrose?

Indicate which of the following criteria are important for the selection of a buffer to use in an in vitro biochemical reaction. (Select all that apply.) a. The molecular weight of the chosen buffer should be in the range of 150 g/mol to 650 g/mol.

Radiation is energy that is A. not transferred at all B, transferred by direct contact of two objects C. transferred by moving air currents D. transferred by electomagnetic waves

Which is an example of Temporal Isolation? A. Flowers that bloom in different months. B. Birds that have different mating calls C. Fruits flies that mate in different locations. D. Squirrels that have different fur colors

A chemical reaction can start when enough activation energy is added to the reactants. Do you think the activation energy for chemical reactions in living things is high or low / Explain your answer

20 Which statement describes a reversible reaction at equilibrium? (1) The activation energy of the forward reaction must equal the activation energy of the reverse reaction.

Count the total number of atoms in CaCO3: 2 3 4 5 6

Question #21TrueFalse The general name for a substance added to a reaction that affects the rate but is not consumed in the reaction is called a complex a. True b. False