You are given 2 balls that are made of the same material. They are also the same size and color. One is hollow and one is solid. Determine the physical property that could be used to identify the ball as a solid. Group of answer choices

boiling point

solubility

pH

density

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

What is the name of the enzyme that forms at the start of transcription?