Prepare 250ml of a 4.8m nacl solution.

First we need to calculate the number of moles of NaCl in 250 ml of 4.8 M NaCl solution.

Number of moles = molarity × (volume of solution in L)

                             = (4.8 M) × (250/1000 L) = 1.2 moles

Now calculte the mass of NaCl required to be dissolved in 250 ml to prepare 4.8 M Nacl solution.

Hence, mass of NaCl = moles of NaCl ×molar mass of NaCl

                                   = 1.2 moles×58.5 g/mol = 70. 2 g

Thus, we need nto dissolve 70.2 grams of NaCl in 50 ml water and then dilute it to 250  ml to get the moalrity of 4.8 M.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.