30 points for 3 questions. the answer with all correct will get brainliest! ! 1.) which is a false statement about vinegar? a. it is a pure substance. b. it is physically combined. c. it is made up of more than one pure substance. d. it is capable of being separated into its original components by physical means. 2.) air is made up of about 21% oxygen and 78% nitrogen. in this solution, oxygen is the and nitrogen is the a. solute; solvent b. solvent; solute c. element; compound d. compound; element 3.) 5 g of sugar is dissolved in 50 g of water. what is the mass of the sugar water? a. 45 g b. 50 g c. 55 g d. 60 g