This topic contains a solution. Click here to go to the answer

Author Question: According to the following thermochemical equation, what mass of HF (in g) must react in order to ... (Read 63 times)

gbarreiro

  • Hero Member
  • *****
  • Posts: 566
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



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

annierak

  • Sr. Member
  • ****
  • Posts: 340
Answer to Question 1

C

Answer to Question 2

C




gbarreiro

  • Member
  • Posts: 566
Reply 2 on: Aug 27, 2018
Wow, this really help


cici

  • Member
  • Posts: 325
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

For a complete list of videos, visit our video library