Describe what you would see if calcium carbonate was added to propanoic acid and compare this to the reaction of calcium carbonate with nitric acid. Explain the difference
in the reactions.

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

How have the greenhouse gasses increased from the year 2000 to 2018