Asample of a gaseous substance at 25 celcius and 0.862 atm has a density of 2.26 g/l. what is the molecular weight

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.

Which characteristics can be used to differentiate star systems? check all that apply.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false