A sample of hydrogen gas at a pressure of 0.803 atm and a temperature of 26.5 °C, occupies a volume of 867 mL. If the gas is allowed to expand at a constant temperature until its pressure is 0.418 atm, the volume of the gas sample will be in mL.

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.