1. Sodium hydroxide sold commercially has a soluble anti caking agent added so the crystals won't clump up. If excess aqueous lead (II nitrate is added to a 5.0 g sample of commercially sold sodium hydroxide 12.7 g of lead (II) hydroxide are recovered through filtration . What is the % purity of the sample of sodium hydroxide ?

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

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

What best discribes the relationship between wavelength and frequency in a electromagnetic wave