How many molecules are present in a 25.0 g sample of O2 gas?​

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.

What pair of body systems provide the raw materials that cells need for energy