Why is the increase in atmospheric carbon dioxide dangerous?

a) the gas inhibits the escape of heat from earth’s atmosphere.
b) carbon dioxide inhibits rainfall causing long droughts.
c) the gas prevents plants from photosynthesizing.
d) carbon dioxide is highly toxic if inhaled.

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

Find the mass, in grams, of 5.00*10^23 molecules of f2

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures