Tetraboric acid, H2B4O7, is prepared by heating boric acid, H3BO3 ...

[fnuegbu]

Tetraboric acid, H2B4O7, is prepared by heating boric acid, H3BO3 (a condensation reaction involving water loss). If 400.0 mmol H3BO3 are used, what mass (g) of H2O is formed, assuming quantitative stoichiometric conversion?
 
  A) 5.77
  B) 0.500
  C) 0.320
  D) 7.21
  E) 9.01

Question 2

6.0 karat gold contains ________ gold.
 
  A) 6.0
  B) 25
  C) 50.
  D) 75
  E) 1.0  102

[blazinlyss]

Answer to Question 1

E

Answer to Question 2

B

[fnuegbu]

TY

[blazinlyss]

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