Compare the TLC Rf values for the components in your spearmint oil sample with the TLC Rf values obtained for the R-(-)-carvone, R-( )-limonene and (1R, 2R, 4R)-dihydrocarveolstandards. List which fractions contained which component (for example, fractions 5-7 contained component X). Was TLC an adequate technique to identify the identity of the components of the spearmint oil in each of your fractions

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

What is the volume of the fluid in the graduated cylinder with accuracy and measured to the correct degree of precision? 41.2 ml 42.0 ml 41.23 ml 41.89 ml

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.