15 match the term with its description. match term definition
acid a) a compound that increases the hydroxide ions
(oh−) when it is dissolved in a solution base
b) an atom or molecule that has a positive or negative charge ions
c) a value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water ph d)
a compound that increases hydrogen ions (h+) when it is dissolved in a solution

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation:

Which of the following is not an assumption that scientists must make about the natural world? a. regularity b. causality c. predictability d. plausibility