A sample of 7.55 moles potassium hydroxide, KOH, was dissolved in water to yield 285 mL of solution. What is the molarity of the solution?

Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon

Which of the following words describe the reality that the universe looks the same from various perspective

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it