Asample contains both naoh and nacl. 0.500 g of this sample was dissolved in water to make a 20.0 ml solution and then this solution was titrated by 0.500 mol/l hcl solution. if 22.1 ml of hcl was used to reach the end point, what is the mass % of naoh in the sample?

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 atomic number, or number, is the described as the number of in the nucleus of an chemical element.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?