This is using dimensional analysis, and I'm stuck on this question, but I'll show what I have so far. The questions is: If there is 3.34x1022 atoms in a CH3OH sample. What is the mass of this sample, how many moles are there of this sample, and how many molecules are in this sample? Initially, I decided to try to solve for moles, but I'm REALLY lost. What i did was is figured out the percent of oxygen, carbon, and hydrogen present, then multiplied the percentages by the number of atoms to figure how many of each element's atoms were present in the sample. My idea was to use this data to solve for how many moles of the sample I had, so that from there I could calculate the mass and molecules. Here's the calculations I did, but it doesn't seem right to me, I am going to use E for x*10p. So for example, using the above number 3.34x1022, I would type it as 3.34E22. O atoms present = 1.67E22 H atoms present = 4.175E21 C atoms present = 1.2525E22 (1.67E22 O atoms)*(1 mole O/6.02E23 O atoms)*(1 mole CH3OH/1 mole O)*(3 mole H/1 mole CH3OH)*(6.02E23 atoms H/1 mole H)*(1 mole CH3OH/4.175E21 H atoms)*(1 mole C/1 mole CH3OH)*(6.02E23/1 mole C)*(1 mole CH3OH/1.2525E22 atoms) = 5.77E-3. I feel like this is completely wrong, but I am at a total loss. Any suggestions on how to approach this question? I don't necessarily want someone to solve it for me, just nudge me in the right direction. Thanks.  Would what I'm trying to do be just as simple as dividing the amount of atoms by the number of atom species? So 3.34x1022/6 to get the molecules?