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:
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Q113: The most common oxidation state of silicon
Q114: Which group 3A element is a metalloid?
A)B
B)Al
C)Ga
D)In
E)Tl
Q115: What is the formula of borax?
A)H3BO3
B)H2B4O7
C)P5O8
D)B2O3
E)Na2B4O7 ∙
Q116: The disilicate ion is _.
A)Si2O88-
B)Si2O76-
C)Si2O84-
D)Si2O86-
E)Si2O72-
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A)orthosilicate ion
B)silicide ion
C)thiosilicate
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A)B2O
B)BO2
C)BO
D)B2O3
E)B2O4
Q120: The correct name of H2CO3 is _.
A)hydrogen
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Q123: Which compound would produce a basic aqueous
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