Which two nuclei are fused in a thermonuclear weapon? a. hydrogen and tritium c. carbon-13 and deuterium b. tritium and deuterium d. None of the above

An animal that backs on a warm rock during the morning hours but retreats to the shade of the rocks during the middle of the day is mostly likely a (n) A. ectotherm B. endotherm C. vertebrate D. chordate

Which of the following best defines one mole of a substance? Mass, in grams, of each particle of the substance Mass, in grams, of the nucleus of the substance's atoms Amount of substance present in one atom of the substance Amount of substance

When studying the movement of heat, what does the term "system" refer to? What does "surroundings" refer to?

What is a low pressure system?

Why is mitosis a form of asexual reproduction?

NaOH+HCl--> NaCl+H2O what is the total number of grams of H2O produced when 116 grams of the product, NaCl, is formed?

Is a sample of liquid nitrogen more dense than a sample of nitrogen gas

You have a balloon containing 1 L of air at STP in a vacuum chamber. What will the volume of the balloon be when you reduce the pressure by half and increase the temperature to 373 K?

Which method will correctly determine whether the forces on an object are balanced or unbalanced? A. Multiply the forces in the horizontal direction by the forces in the vertical direction. B.

Carbon is found in all known forms of life. Which statement best describes why carbon is uniquely suited to forming macromolecules such as those found in living organisms? A. Carbon forms large compounds that are not chemically reactive. B.