Determine the mass of butane gas that was released from the lighter and collected in the gas collection tube. use the given below to derive the answer.
given:
mass of lighter before (g)
32.105 g
volume of butane gas collected (ml)
90. ml
mass of lighter after (g)
31.844 g
room temperature (k)
297 k
air pressure (atm)
1.2 atm
so (90)(1.2) = (297)

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.