In its aqueous solution, 32% of a substance dissociates to release hydroxide lons. Which of the following is true for the substance? a. It is a strong base. b. It is a strong acid. c. It is a weak acid. d. It is a weak base.​

Compare and contrast physical changes with chemical changes.

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

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