Chemistry, 30.06.2019 16:00 mary9590

What do measurements of the mass of the milky way indicate?

Answers: 1

Show answers

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 01:20, whrjegt4jrnfdvj

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Answers: 2

continue

Chemistry, 22.06.2019 10:40, rntaran2002

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

Answers: 2

continue

Chemistry, 22.06.2019 11:40, jerrysandoval22

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

Answers: 2

continue

Chemistry, 22.06.2019 20:00, jalenevoyles

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.