0 ApI 10 4:48-39 PM Sara Abbou Q OWLY2 | Online teaching andi xG what is 0.872 i

Question

0 ApI 10 4:48-39 PM Sara Abbou Q OWLY2 | Online teaching andi xG what is 0.872 in kcal-Google x eAssignment/takeCovalentActivity.do?locator assignment-take&takeAssignmentSessionLocator; assignment-take Use the Refereaces to access impertant values if meeded for this question. Calcium carbide reacts with water to produce acetylene gas according to the following equation: The product gas, C2H2 is collected over water at a temperature of 20 ? and a pressure of 757 mm Hg. If the wet GI, gas formed occupies a volume of 8.91 L, the number of moles of CaC reacted was 17.5 mm Hg at 20 °C mol. The vapor pressure of water is Submilt Answer Retry Entire Group 9 more group attempts remaining Previous 6

Explanation / Answer

Partial pressure of C2H2 = 757-17.5 = 739.5 mm Hg

Using ideal gas law:

PV = nRT

Putting values:

(739.5/760)*8.91 = n*0.0821*293

Solving we get:

n = 0.36

So the number of moles of CaC2 that must have reacted is equal to 0.36

Hope this helps !

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