How do you convert grams into mmols?

Question

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Answer 1

Do you need an example??? I always found it helpful if I could actually look at something to figure it out. Try this....

A compound containing only Hydrogen & Carbon (a hydrocarbon) has a mass percent of Hydrogen equal to 9.10%.

Let the mass of the hydrocarbon equal 100g. Since the Hydrogen is 9.10g, the remaining carbon must have a mass of 90.9g.

Now convert grams into moles:

90.9g C x mol/12g = 7.58 mol C
9.10g H x mol/1g = 9.10 mol H

From here you could go even futher to figure out the empirical formula if you'd like...

Divide each number of moles, by the smallest number above:

7.58 mol C/7.58 = 1.00 mol C
9.10 mol H/7.58 = 1.20 mol H
this in turn yeilds CH1.2

Next express the empirical formula as the simplest whole number ratio:

Since 1.2 is one and one-fifth, multiplication by 5 is required to convert the moles of Hydrogen into a whole number. Both the Carbon and the Hydrogen are multipied by 5

C(1 x 5)H(1.2 x 5) = C5H6

Simple, huh? Even a monkey could do it! LOL (just kidding)!

Answer 2

You need to get the formula weight for the substance you are working with. The weights on the periodic table are in the units grams/mol. So, you can set up a relationship type equation using that info from how many grams you have compared to how many grams there are in one mole.

Answer 3

You divide by the molar mass. N grams / M grams per mol == X mol. The molar mass of an element is available from the periodic table, as atomic mass.

"For example, the atomic mass of iron is 55.847, and therefore one mole of iron has a mass of 55.847 grams."

Answer 4

Grams x 1000 divided by molucular weight of the compound=milli moles

Answer 5

It depends on the molecular weight of the substance you're interested in converting. Here are a few examples...

To convert mmol/l of glucose to mg/dl, multiply by 18.
To convert mg/dl of glucose to mmol/l, divide by 18 or multiply by 0.055.

To convert mmol/l of HDL or LDL cholesterol to mg/dl, multiply by 39.
To convert mg/dl of HDL or LDL cholesterol to mmol/l, divide by 39.

To convert mmol/l of triglycerides to mg/dl, multiply by 89.
To convert mg/dl of triglycerides to mmol/l, divide by 89.

To convert umol (micromoles) /l of creatinine to mg/dl, divide by 88.
To convert mg/dl of creatinine to umol/l, multiply by 88.