<p>Humulone, C21H30O5, is one of the flavor components that gives a bitter taste to the hops used in making beer. </p>
<p>(a) What is the molar mass of humulone?
g/mol
(b) How many moles of C21H30O5 molecules are in 175 mg of humulone?
mol
(c) What is the mass of 0.560 mol of humulone?
g
(d) How many atoms of hydrogen are in 3.60 pg of humulone?
atoms
(e) What is the mass of 1.40 109 molecules of humulone?
g
(f) What is the mass of two molecule(s) of humulone?</p>
<p>For part A i got 362.5 g/mol. For part B I got 4.83e-4. I am having trouble on parts C, D, E and F</p>
<p>irrelevant … it’s summer, man, c’mon</p>
<p>let’s see, i took chem my junior year and i self taught it so let’s see what i can get you.</p>
<p>C = 12.01 g/mol
H = 1.01 g/mol
O = 16.00 g/mol</p>
<p>so for (A) we have [21 mol C][12.01 g/mol C] + [30 mol H][1.01 g/mol H] + [5 mol O][16.00 g/mol O] = 362.51 g/mol C21H30O5</p>
<p>(B) 175 mg x [1 g/ 1000 mg] x [1 mol / 362.51 g] = 4.83 x 10^-4</p>
<p>(C) .560 mol x [362.51 g/ mol] = 203 g C21H30O5</p>
<p>(D) 3.60 pg x [1 g/ 10^12 pg] x [ 1 mol/ 362.51 g] x [ 6.02^23 molecules/ 1 mol] x [ 30 atoms H/ 1 molecule ] = 1.79 x 10^10 atoms H</p>
<p>(E) I’m going to assume you mean 1.40 x 10^9, so for that
1.40 x 10^9 molecules x [ 1 mol/ 6.02^23 molecules ] x [362.51 g/ 1 mol] = 8.43 x 10^-13 g</p>
<p>(F) 2 molecules x [ 1 mol/ 6.02 x 10^23 molecules] x [362.51 g/ 1 mol] = 1.20 x 10^-21 g</p>
<p>sorry for any mistakes, I’m a little rusty on my chem.</p>