Iwant to know about the future of the universe. i should study

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.

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

The identities of substances are the same before and after which type of change