Barrons SAT Subject Test Chemistry, 13th Edition

(A) : 1

(B) 4 : 1

(C) 8 : 1

(D) 16 : 1

(E) : 1

50. A molecule in which the electron configuration is a resonance hybrid is

(A) SO 2

(B) C 2 H 6

(C) CI 2

(D) HBr

(E) NaCl

51. What is the pH of a solution in which the [OH−] is 1.0 × 10−4?

(A) −4

(B) +4

(C) +7

(D) −10

(E) +10

52. 
    

    If 0.365 grams of hydrogen chloride is dissolved to make 1 liter of solution,
    the pH of the solution is
    (A) 0.00100
    (B) 0.0100
    (C) 1.00
    (D) 2.00
    (E) 12.000

    
    


53. 
    

    In the laboratory, a sample of hydrated salt was heated at 110°C for 30
    minutes until all the water was driven off. The data were as follows:

    
    

Mass of the hydrate before heating = 250 grams

Mass of the salt after heating = 160 grams

From these data, what was the percent of water by mass in the original

sample?

(A) 26.5

(B) 36

(C) 47

(D) 56

(E) 90