Plants need from the air for photosynthesis. A. carbon dioxide B. soil
C. oxygen D. carbon monoxid

A48 g piece of ice at 0.0 ∘c is added to a sample of water at 7.4 ∘c. all of the ice melts and the temperature of the water decreases to 0.0 ∘c. how many grams of water were in the sample?

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

What is the percent by mass of oxygen in fe2o3