A220.0-ml sample of helium gas is in a cylinder with a movable piston at 105 kpa and 275 k. the piston is pushed in until the sample has a volume of 95.0 ml. the new temperature of the gas is 310. k. what is the new pressure of the sample? (1) 5l.1 kpa(2) 216 kpa(3) 243 kpa(4) 274 kpa

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.