a gaseous hydrogen and carbon-containing compound is decomposed and found to contain 82.66% carbon and 17.34% hydrogen by mass. the mass of 158 ml of the gas, measured at 556 torr and 25 ∘c, was 0.275 g.

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?

What gpa will you get if you make all a's and 1 b?

How are students who take the writing portion of accuplacer graded?