Thursday
July 24, 2014

Homework Help: chemistry 122

Posted by sean on Tuesday, December 11, 2012 at 9:48pm.

81) 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) DHrxn = -184 kJ
81)
A) 173 g B) 37.5 g C) 150. g D) 107 g E) 42.7 g

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - According to the following thermochemical equation, what mass of H2O...
Chemistry - Put the following in order in terms of increasing melting point: ...
chem - How many oxygen atoms are in 1.90g og quartz (SiO2)? ok so 1.90g SiO2(...
CHEMISTRY - For the following reaction, what mass of SIC is made from120.2g of...
CHEMISTRY - For the following reaction, what mass of SIC is made from120.2g of...
chemistry - Reacting 959 mol of SiO2 with excess carbon yields 28.8 kg of SiC. ...
Chemistry - What is the equilibrium constant for the reaction: Si + O2 <->...
college chemistry - What volume (in Liters) of hydrogen must react to form 17.0L...
ChemHelp - Chem Help! Limiting and excess reagent? Identify the limiting and ...
chemistry - how many oxygen atoms are in 1.60g of quartz - SiO2? how do you ...

Search
Members