Use a periodic table to calculate the applicable rolar mass. Density of water is 1kg/1L. A solution was made with 300 grams of (C3H5OH) and 500 grams of water.
What is the molarity of this solution?
0.81
10.33M
0.19
19 M

D or 19 M is not correct.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

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