Which situation is an indication that a chemical change has occurred?
a. no heat is released.
b. a gas is formed.
c. no color change occurs.
d. the temperature does not change.

Which of the following statements about acidic water is true? a. acid has no effect on the h, o molecules. b. the solution contains a larger number of oh ions than h, o ions. c. the solution contains a larger number of h, o ions than qh ions. d. the solution contains an equal number of h, o ions and oh ions. none of the above e.

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?