2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH How many moles of NaBr are required to react with 187.34 g of calcium hydroxide?

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

The fact that the total amount of energy in a system remains constant is a(n)