Multiple Choice
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
Correct Answer:

Verified
Correct Answer:
Verified
Q36: The reaction between nitrogen dioxide and water
Q37: Nearly all commercial oxygen is obtained _.<br>A)from
Q38: What is the primary commercial use of
Q39: Which of the following would produce the
Q40: Which group 7A halogen is radioactive?
Q42: The oxidation number of N in NO<sub>3</sub><sup>-</sup>
Q43: Hydrogen can form hydride ions.Elements in group
Q44: Consider the following xenon compounds: <br>(i)XeCl<sub>2</sub><br> (ii)XeCl<sub>4</sub>
Q45: What is the formula of borax?<br>A)H<sub>3</sub>BO<sub>3</sub><br>B)H<sub>2</sub>B<sub>4</sub>O<sub>7</sub><br>C)P<sub>5</sub>O<sub>8</sub><br>D)B<sub>2</sub>O<sub>3</sub><br>E)Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub> ∙
Q46: Most mined phosphate rock is _.<br>A)used as