How many grams are there in 4.80 x 1021 molecules of Nalo?

What is the molar mass of a gas that has density of 2.054 g/l

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

What metric units would you use to measure the thickness of a key