A sample of Br2(g)Br2(g) takes 38.0 min38.0 min to effuse through a membrane. How long would it take the same number of moles of Ar(g)Ar(g) to effuse through the same membrane

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

Which terms are used to identify pure substances

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution