When humans burn fuel or

cut down trees, they (increase/decrease)

levels of carbon dioxide in the atmosphere.

Which would exhibit characteristics of both a metal and a nonmetal? select one: a. si b. ge c. sb d. po e. all of the above exhibit characteristics of both a metal and a nonmetal?

Balance the following reaction: Cac, (s) + H2O (1) - -> CH2 (g) + Ca (OH) 2 (aq)

What makes nitric oxide unique among neurotransmitters? Select one: a. It is an organelle. b. It is released before the action potential occurs. c. It is taken back up into the presynaptic neuron. d. It is a gas.

If 1 mole of gas occupies 22.4 liters of space calculate the number of moles that will occupy 11.2 liters of space? Show work.

What molecules have tetrahedral arrangement of electron pairs but is not a tetrahedral molecule. Methane Water Carbon dioxide Boron trifluoride

What two ions are central to the arrhenius definitions of acids and bases?

Question 1 A process in which suthetances chemically rearrange to form new substances o Molecule Energy o Organism O Chemical reaction O Matter O Cellular respiration

What are the uses of evaporative salts?

Which of the following are elements? O2 Ca KF B

Which of the characteristics below best describes organic compounds