A certain gas occupies 0.418 litres at 27^@C and 740 mm Hg. If the same gas weighs 3.00 g, what is its molecular weight?

A certain gas occupies 0.418 litres at 27^@C and 740 mm Hg. If the sa

1.	A certain gas occupies 0.418 litres at 27^@C and 740 mm Hg. If the same gas weighs 3.00 g, what is its molecular weight?
Answer» <html><body><p><br/></p>Solution :Number of <a href="https://interviewquestions.tuteehub.com/tag/moles-1100459" style="font-weight:bold;" target="_blank" title="Click to know more about MOLES">MOLES</a> in 3.00 g of gas = `(3.00)/M`, where M is the <br/>molecular <a href="https://interviewquestions.tuteehub.com/tag/weight-1451304" style="font-weight:bold;" target="_blank" title="Click to know more about WEIGHT">WEIGHT</a> of the gas. According to the gas equation <br/>`PV = nRT` <br/> <a href="https://interviewquestions.tuteehub.com/tag/substituting-1231652" style="font-weight:bold;" target="_blank" title="Click to know more about SUBSTITUTING">SUBSTITUTING</a> the values, we have `740/760 <a href="https://interviewquestions.tuteehub.com/tag/xx-747671" style="font-weight:bold;" target="_blank" title="Click to know more about XX">XX</a> 0.418 = 3.00/M xx 0.0821 xx 300` <br/>(P = 760/760 atm ) <br/>`:. ""M = 181.5`</body></html>