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anonymous
 one year ago
A sample of gas with a mass of 8.40 g occupies a volume of 4.50 L at 298 K and 1.10 atm. What is the molar mass of the gas? Show all work used to find your answer. *Best answer gets medal, fan and testimony*
anonymous
 one year ago
A sample of gas with a mass of 8.40 g occupies a volume of 4.50 L at 298 K and 1.10 atm. What is the molar mass of the gas? Show all work used to find your answer. *Best answer gets medal, fan and testimony*

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aaronq
 one year ago
Best ResponseYou've already chosen the best response.3Use the ideal gas law, substitute in the definition of moles, solve for M, molar mass. Ideal gas law: \(\sf PV=nRT\) moles: \(\sf n=\dfrac{m}{M}\) \(\sf \huge PV=\dfrac{m}{M}RT\rightarrow M=\dfrac{mRT}{PV}\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0May you help me plug in the variables?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3I can check it for you if you give it a try

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok. Give me a second.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I have: 1.10*4.50 L = n(0.08206atm)(298K) And that's all I can do. Unfortunately.

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3that's right! you can now solve for n, then divide the mass 8.4 g by the moles.

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3the mass is given in the question, it's 8.4 grams

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So it would be: 1.10 atm * 298 K = 24.45388 8.4 g / 24.45388 = 0.3435

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3not quite, first solve this equation: 1.10*4.50 L = n(0.08206atm)(298K) divide the mass by the answer (moles)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.04.95 = n(0.08206*298) 4.95 = n(24.45388) 4.95/24.45388 = 0.202421... n = 0.202421

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3okay, looks good! now divide the mass by n

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0WOOHOO! How would I properly write with sig figs?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3all the numbers used have 3 sig figs, so make the answer have 3 figures.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0244. Thank you so much! You're a life saver :D

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3that's not quite right. look at the fourth digit, you have to round up

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3yeah. you should give this a look https://www.physics.uoguelph.ca/tutorials/sig_fig/SIG_dig.htm

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@aaronq there is problem in this question

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0should the answer be around 41 to 42 because we are dividing 8.4 by n

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3you're right, the answer is 41.4974933333333333 I guess this person plugged the numbers into the calc wrong

aaronq
 one year ago
Best ResponseYou've already chosen the best response.3thanks for double checking lol
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