Diazepam is a common benzodiazepine drug prescribed to treat anxiety, sleep disorders, and seizures. Benzodiazepines are categorized as Schedule IV drugs, which includes medications approved by a medical doctor for therapeutic reasons.
Like all other substances, diazepam has a molar mass, or weight equal to grams per molecule. Knowing the molar mass of diazepam will help physicians calculate proper doses and caregivers administer it correctly.
Calculating the molar mass of a substance requires two known values: the weight of one molecule of the substance and how many molecules are in one gram of the substance.
This article will discuss how to calculate the molar mass of diazapam if 0.05570 mol weighs 15.86 g. General tips on how to accurately calculate the molar mass will also be given.
Convert moles to grams
Diazepam is a benzodiazepine that is used to treat anxiety, insomnia, and muscle spasms. It is available as a prescription drug under the brand names Valium and Dalaxol and in lower doses as a dietary supplement.
The molecular mass of diazepam is 365.5 grams per mole. If you know the mass of one molecule of diazepam, you can calculate its molar mass using this value.
Because you know the number of molecules in one gram of diazepam and you calculated the molar mass, you can now convert the amount of 0.0557 moles of diazepam to grams.
0.0557 mol x (365.5 g/mol) = 15.86 g of diazapamn per 0.0557 mol.
Use formula for calculating molar mass
The molar mass of a chemical is the total mass of atoms in one gram of that substance. It is usually measured in grams per mole (which is 6.022 × 10^23 atoms or molecules) or milligrams per millimole (which is 1 atom or molecule per 1,000 molecules of solution).
To find the molar mass of a substance, you need to know how many molecules are in one gram. You can do this by using a formula that combines the chemical formula for the substance with knowledge of how many atoms or molecules are in one gram.
The formula for finding the molar mass of a solid depends on whether the solid is an oxide, salt, or pure substance. This article will discuss these distinctions and provide examples for each type.
Find mass of one molecule
Diazepam is a benzodiazepine drug prescribed to treat anxiety, insomnia, and panic attacks. It is sold under the brand names Valium and Dalmane.
Like other drugs, Diazepam has a molecular mass which determines its weight. One molecule of Diazepam weighs 285.82 g/mol. If you had 0.05570 mol of Diazepam, you would have 2.926 g of the drug.
Diazepam is an abundantly synthesized drug which makes it difficult to find an exact molar mass. Most sources cite a mass between 285 and 290 g/mol, so we will go with that for our calculation.
2.926 g of Diazepam x (290 g/mol) = 869 mg/mLof Diazepam 0.05570 mol of Diazepam x (285 g/mol) = 9.
Divide by number of molecules in sample
In this case, you would divide the mass of the sample by the number of diazepam molecules it contains. Since you know the mass of one molecule, you can find how many molecules are in the sample.
So, let’s do the math: 0.05570 mol diazepam weighs 15.86 grams. Dividing the mass by the number of molecules gives you a molar mass of about 730 grams per mole. There are 6 atoms in a molecule of diazepam, so there are 6 molecules in this sample.
The normal ratios between masses do not change, even if the substance is in a liquid form. The liquid form just makes it easier to measure its mass. Mass is a measurement of how much “thing” there is, whether that thing is solid, liquid, or gas.
Calculate total sample mass
In this case, you would need to calculate the mass of diazepam per 100mL of solution. 0.05570 mol of diazepam weighs 15.86 grams, so dividing that by 100 gives you 0.05570g per 100mL of solution.
You would then need to dilute the solution by 100: 0.05570g per 100mL x 100 = 5.57g per liter of solution. This is the total mass of diazepam in one liter of the 5% solution.
You could also solve this problem by multiplying the molar mass (0.05570g/mol) by the number of moles (0.05570). This gives you 5.
Round results to obtain an accurate value
Diazepam is a benzodiazepine drug that is used to treat anxiety, insomnia, and seizures. It is available in tablets and solution for oral administration, and as a solution for injection into the vein.
The molecular mass of diazepam is calculated by finding the total mass of one molecule in grams and then dividing by one hundred. The formula looks like this:
where MM is the molecular mass and g is the mass in one molecule.
To find the molar mass of diazapam, you would need to know how many molecules are in one gram. One thousand five hundred seventy molecules per gram is the number you are looking for. Plugging that into the formula above will give you 1.5 grams per mole. One mole of any substance has six atoms of hydrogen per molecule, so we need to add that in as well.