If 0.45 moles of nacl was dissolved in enough water to make 300.0ml of solutions, what is the molarity?

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?