how do you convert grams to moles
MASS/GFM
GFM stands for gram formula mass which is the same thing, in almost all instances, as molar mass.
To convert grams to moles, you need to know the molar mass of the substance you are working with. The molar mass is the mass of one mole of a substance and is expressed in grams/mole.
Here's the step-by-step process to convert grams to moles:
1. Identify the substance for which you want to convert grams to moles.
2. Determine the molar mass of the substance. This can be found on the periodic table by adding up the atomic masses of all the atoms in the chemical formula of the substance.
3. Divide the given mass in grams by the molar mass of the substance.
The formula to convert grams to moles is:
moles = grams / molar mass
Let's take an example to illustrate the process:
Example: Convert 25 grams of carbon dioxide (CO2) to moles.
1. The substance we are working with is carbon dioxide (CO2).
2. Determine the molar mass of CO2:
Molar mass of C = 12.01 g/mol
Molar mass of O = 16.00 g/mol
Total molar mass of CO2 = (12.01 * 1) + (16.00 * 2) = 44.01 g/mol
3. Divide the given mass in grams by the molar mass:
Moles of CO2 = 25 g / 44.01 g/mol = 0.567 moles (rounded to three decimal places)
Therefore, 25 grams of carbon dioxide is equal to approximately 0.567 moles.