Hydrogen and Oxygen combine to form water. In this chemical reaction, who represents the reactions(s) A. water
B. oxygen and water
C. hydrogen and water
D. hydrogen and oxygen

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

Which three statements represent the benefits of performing experiments using computer simulations?

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.