Which of the following sets of quantum numbers is (are) valid for a 4d electron? (select all that are valid) note: the format/order of the answers is (n, l, ml, ms).

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer