Scurvy is a disease that can be avoided by a diet that includes vitamin C-rich foods. A tablet of vitamin C contains 1000 mg of ascorbic acid which has a pKa of 4.13 (at room temperature, considering the most acidic proton). If a single vitamin C tablet is completely dissolved in 85 mL of water, what is the pH of the final solution? Show your working. Express your answer to 2 significant figures.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Plz mark brainliest 30 points1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s.2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?