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Author Question: According to the following thermochemical equation, what mass of HF (in g) must react in order to ... (Read 58 times)

gbarreiro

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on: Aug 27, 2018
According to the following thermochemical equation, what mass of HF (in g) must react in order to produce 345 kJ of energy? Assume excess SiO2.
 
  SiO2(s) + 4 HF(g)  SiF4(g) + 2 H2O(l) Hrxn = -184 kJ
 
  A) 42.7 g
  B) 37.5 g
  C) 150. g
  D) 107 g
  E) 173 g

Question 2

In the production of an ester, the carboxylic acid loses which atom or group of atoms?
 
  A) oxygen from the C=O
  B) H from the OH group
  C) the OH group
  D) the entire COOH group
  E) oxygen from the OH


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annierak

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Reply #1 on: Aug 27, 2018
Answer to Question 1

C

Answer to Question 2

C


gbarreiro

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Reply 2 on: Aug 27, 2018
Excellent

tranoy

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Reply 3 on: Yesterday
Wow, this really help

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