Question Completion Status: QUESTION 11 Consider the following reaction CH4 (g)

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Question Completion Status: QUESTION 11 Consider the following reaction CH4 (g) + 202 (g) CO2 (g) + 2 H20(g) -4xn--890.0 kj/mol of energy (k) released when 168 grams of O2 are burned. Report answer to correct number of significant figures and do not include units or the sign of Hrn QUESTION 12 How many unpaired electrons are in the ground state electron configuration for silver? Your answer should be one number. Click Sove and Submit to save and submit. Click Save All Answers to sove oll onswers °Type here to search

Explanation / Answer

11)

Molar mass of O2 = 32 g/mol

mass of O2 = 16.8 g

we have below equation to be used:

number of mol of O2,

n = mass of O2/molar mass of O2

=(16.8 g)/(32 g/mol)

= 0.525 mol

From reaction,

when 2 mol of O2 burns, heat released = 890.0 KJ

So, for 0.525 mol of O2, heat released = 890.0*0.525/2

= 234 KJ

Answer: 234 KJ

Feel free to comment below if you have any doubts or if this answer do not work. I will correct it and submit again if you let me know

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