Calcium carbonate is a chemical compound found in rocks and seashells. its chemical formula is caco3. which of the following statements is true?

a. calcium carbonate has two atoms of carbon.
b. calcium carbonate has three atoms of oxygen.
c. calcium carbonate has three atoms of carbon dioxide.
d. calcium carbonate has two atoms of oxygen.

Explain the significance of the increased cell specialization of the volvocine line

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.

Producing disposable grocery bags consumes resources. recycling disposable bags is a solution that can recover some of the resources used to make new bags. which of the following behaviors could further refine the solution? a. disposing of bags by burning them b. reusing bags whenever possible c. using bags at once so that they do not break d. using only nonrenewable materials to make new bags subject is environmental science for apex users