A solution is made by dissolving 37.5 g of sodium sulfide (Na2S) in
217 g of water.
What is the molality of the solution?

What is the study of how matter and energy interact? a. biology b. physics c. planetary science d. chemistry

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

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