How do tissues replenish the cells contained within them?

A 250g sample of water with an initial temperature of 98.8oC loses 1794 cal of heat. What is the final temperature of the water?

A student conducts an experiment to determine how the amount of water given to a plant affects its growth. What is the independent variable for this experiment?

Miriam notices when she goes to the beach that sometimes the water rises as high as the pier. At other times of the day, the water barely covers the pillars under the pier.

Why is it important to avoid consuming sugar?

What is one way in which chemistry affects your everyday life?

Can magnetism be used to identify a substance

Nitrogen dioxide dimerizes to give dinitrogen tetroxide: 2NO2 (g) → N2O4 (g). At 298 K, 12.55 g of an NO2/N2O4 mixture exerts a pressure of 0.963 atm in a volume of 6.92 L. What are the mole fractions of the two gases in the mixture?

What is the concentration of a solution, in gsolute/100gsolvent, made using 2.83 g of KNO3 in 2.03 g of H2O? Do not include units in your answer.

Why does pressure change in this way? Select all that apply.

Will platinum (pt) metal react with a lead (ii) nitrate solution?