The concentration of a potassium hydroxide solution is 84.0 g dm-3. Calculate the number of moles of potassium
hydroxide present in 300 cm3 of the solution.[K,39,H,1 0,16]​

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

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

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device