Atomicity consistency isolation durability a. ensures that at the end of any transaction the system will be in a valid state b. a transaction is fully completed or not begun at all c. once a transaction completes and commits, all of the changes are permanent d. appears to be the only action that the system is carrying out

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.