A mixture of oxygen, nitrogen, and hydrogen gases exerts a total pressure of 0.90 atm at 0°C. The partial pressure of oxygen is 0.21 atm, and the partial pressure of nitrogen is 0.45 atm. What is the partial
pressure of hydrogen?

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

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

If a gas has an initial pressure of 101kpa and a volume of 10l, then it expands to a volume of 20l, what is the new pressure?