QUICKKK HURYY What is the percent composition of carbon in methane, CH4? Round off your answer to the nearest tenth of a percent. Record your answer in the grid below.

Which of the following might a chemist choose to study? a. glacier movement in alaska b. better ways to recycle plastics c. the effects of hurricanes on turtle populations d. the vibrations in bridges caused by big trucks

Two atoms interact with each other as shown by the equation. complete the equation by filling in the missing parts. 1 2 3 4 5 h he li

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?