The density of an object is defined as mass per unit volume. mathematically we write that: d = m/v. rearrange this expression for: (a) m = ? (b) v = ?

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Asolution is produced in which water is the solvent and there are four solutes. which of the solutes can dissolve better if the solution is heated?