6. Gas-x effuses at a rate of 5.7 mol in 38.0 seconds. Through the same opening, it takes 22 s for 142 g of Cl2 to effuse. What is the molar mass of gas-x?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.

If a particle has z = 25 and 23 electrons, what is its charge?