Aspirin (acetylsalicylic acid, c9h8o4) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved 2. 00 g of aspirin in 0. 600 l of water and measured the ph. What was the ka value calculated by the student if the ph of the solution was 2. 62?.

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.

Jerrold has to buy 12 copies of a textbook which costs $36.25 per copy. how much must he spend for them?

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.