The concentration of cholesterol in blood from a fasting individual is reported as 185mg %, where mg% is mg/100 mL. Convert this concentration to moles/Liter.
mg/1000 = grams.
grams/100 x 10 converts to grams/L.
grams/molar mass converts grams to moles. Now you have moles/L.
what molar mass are you supposed to find?
To convert the concentration of cholesterol in blood from mg% (mg/100 mL) to moles/Liter, you need to follow a series of steps:
Step 1: Convert mg to grams.
Since 1 gram = 1000 mg, you need to divide the given concentration by 1000 to convert it to grams.
185 mg% / 1000 = 0.185 g%
Step 2: Convert grams to moles.
To convert from grams to moles, you need to know the molecular weight of cholesterol. The molecular weight of cholesterol is approximately 386.65 g/mol.
To convert grams to moles, divide the mass in grams by the molecular weight in grams per mole.
0.185 g% / 386.65 g/mol = 0.000478 mol%
Step 3: Convert moles/100 mL to moles/Liter.
To convert from moles/100 mL to moles/Liter, you need to multiply the concentration by 10. This conversion is necessary because there are 10 deciliters (dL) in a liter.
0.000478 mol% * 10 = 0.00478 mol/L
Therefore, the concentration of cholesterol in blood, reported as 185 mg%, is approximately 0.00478 moles/Liter.