The Uniform Crime Reports program began in 1930, and since then has become an important source of crime information for law enforcement, policymakers, scholars, and the media.
The molecular formula for water is H2O. One molecule of water consists of one oxygen atom which is covalently bonded to two hydrogen atoms.
2) Determine the molecular weight: 0.680 g / 0.004362857 mol = 156 g/mol (to three sig figs). Problem #18: An aqueous solution containing 34.3 g of an unknown molecular (nonelectrolyte) compound in 160.0 g of water was found to have a freezing point of -1.3 Â°C. Calculate the molar mass of the unknown compound. Express your answer using two significant figures.