What is the difference between conjugate acid-base pair? a. a H atom. c. a mole water
b. a H+ ion d. a OH– ion​

Afamily is one another name for a group on the table of elements.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

The reactions of photosynthesis occur in the of plant cell? a.mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll