Matter that has a uniform and defined composition is called a

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

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

How many moles of al3+ ions are in 1.25 moles of al2o3