Please I need the answer fast Calculate the pH value in a solution that has a concentration of 0.04 mol/dm3+ ions

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

What three things does a balanced equation show you?