AL EXAMINATION CHM101 Fall 2017 Name pressure increased to 1140 torr. 4 points)

Question

AL EXAMINATION CHM101 Fall 2017 Name pressure increased to 1140 torr. 4 points) meratur, aballoon with a volume of 75.00 Liters at STP has the points 16) From the rule of thumb that "like dissolves like," which three (3) of the following compounds would you expect to be POORLY soluble in water? (3 points] 8) NaCI h) CH:-CH: i) Ca(OCI): Fedcration. Its burn-out velocity is 2,100.mIsec. Using the following information, express this velocity in miles skander is a mobile short-range ballistic missile system produced and deployed by the Russian per hour (mi./hr.). [4 points] 1mi.-1.609 km 1 km- 1000 m lhr 3600 see. 18) When DC Comics shrinking super-hero, The Atom, appeared in the 1960's, he was advertised as being able to dwindle from 6.00 feet to 6.00 inches to 6.00 micro-inches. Convert 6 micro-inches into meters and express your answer in scientific notation. [4 points] 1 m = 39.37 in. 2KNO, + BaCro, For the Molecular Equation Shown: KCro, Write the Complete lonic Equation 17 points] + Ba(NQh 19) a) b) Write the Spectator lons. [2 points] c) Write the Net lonic Equation: 13 points] 128

Explanation / Answer

(15)

P1 V1 = P2 V2

760 * 75.00 = 1140 * V2

V2 = final volume = 760 * 75.00 / 1140 = 50.00 L

(16)

(a) CH3-CH3

(b) CH4

(h) CH2=CH2 becuase they are nonpolar compounds

(17)

2100 m/s = 2100 * 10-3 km / s = 2100 * 10-3 *(1/1.609) / (1/3600) = 4698.6 mi/h

(18)

6 micro inches = 6 * 10-6 inches = 6 * 10-6 / 39.37 m = 1.52 * 10-7 m

(19)

(a) Complete ionic equation

2 K+ (aq.) + CrO42- (aq.) + Ba2+ (aq.) + 2 NO3- (aq.) -----> 2 K+ (aq.) + 2 NO3- (aq.) + BaCrO4 (s)

(b) Spectator ions

K+ and NO3- ions

(c)

Ba2+ (aq.) + CrO42- (aq.) -----------> BaCrO4 (s)

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