Question

calculate the number of moles in 68 grams of methane

sulfate and water H2304 2IN8UH30t Grams/Moles/MM/NA 6. Calculate the number of moles of 185 grams of cyclohexane. 000s4 oles 7. Calculate the number of moles in 68 grams of methane. 4.2587S1343Wb 8. How many grams of propane are found in 27 moles of it? 1190.52 4r ams 9. How many molecules of butane are found in 56 grams of the substance? ole 10. How many grams of hexane are found in 2.65 x 1024 molecules?

Answer 1

6) Moles of Cyclohexane (C6H12) = mass/molar mass = 185/84 = 2.2024 moles ........ Answer

7) Moles of methane (CH4) = mass/molar mass = 68/16 = 4.25 moles ....... Answer

8) Mass of propane (C3H8) = moles*molar mass = 27*44 = 1188 grams ........ Answer

9) Moles of Butane (C4H10) = mass/molar mass = 56/58 = 0.9655 moles

1 mole = 6.023*10^23 molecules

So, 0.9655 moles = 0.9655*6.023*10^23 = 5.82*10^23 molecules. ....... Answer

10) Moles of Hexane (C6H14) = 26.5*10^23/6.023*10^23 = 4.4 moles.

Mass of hexane = moles*molar mass = 4.4*86 = 378.4 grams ........ Answer