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This is a generic answer with an example of how to solve this kind of problem. You can use the technique given here to find the answer to your particular problem. First you need to find the molecular weight of the compound. Once you've done that, then you simply divide the mass of the compound (in grams) by the molecular weight of the compound (in amu). The result is the number of moles. For example: Water (H2O) has a molecular weight of 2 * 1.0 (for the two hydrogens, 1 amu each) + 1 * 16.0 (for the oxygen, 16 amu) or 18.0 amu. So if I have 27.0 grams of water, then I have 27.0 / 18.0 = 1.5 moles of water.
Wiki User
∙ 14y ago
Wiki User
∙ 13y ago- How many moles are there in 72g of Mg.
Mg = 24.3 so we do 72g divided by 24.3 = 3.00 moles (rounded it up from 2.96) Formula is Mass divided by Mr.
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Calculate the number of moles in 112 g of iron?
Molar mass of iron is 56g. Given mass of iron= 112g No. of moles = Given mass/Molar Mass => 112g/56g= 2 moles
How to calculate the number of moles of benzonitrile?
The molar mass of benzonitrile is 103,12 g .
How many moles are in 1.5 grams of iron?
To calculate the number of moles from grams, you must divide by the substance's molar mass
What would be the Mass of 3 moles of ammonia and calculate the number of ammonia molecules?
The mass of 3 mol of ammonia is 51,093 g; the number of ammonia molecules in 3 moles is18,066422571.10e23.
How many moles in NaCHO3?
A mole is a defined number of atoms/molecules of an element/compound. Therefore, the number of moles of NaCHO3 will depend on the mass of NaCHO3 that you have. To calculate the number of moles in a known sample, divide the mass of the sample (in grams) by the molecular weight.
How are molecular weights found from titration?
The results of a titration will tell you the number of moles present in the analyte. If you then also know the mass of this analyte, you can calculate the molecular weight as mass/moles.
How is the number of moles determined from a known mass?
Number of moles = Total mass/Molar mass
Mass mass problems?
Mass-mass problems can be solved in various ways. You should start by writing a balanced equation for chemical reaction involved and eventually change the mass into moles which will facilitate the comparison and allow you to calculate the number of moles required.
How do you calculate the mass in grams of 6.073 molecoles of water?
You divide the 6.073 by 6.022x1023 (avagadros number) to get the moles, then multiply by molecular mass (18) to get mass in grams
How is a number of moles of an element determined from a known mass?
The number of moles is mass in g/molar mass in g.
How you calculate the mass of 1.5 moles of oxygen molecule?
Multiply the molar mass value ( 32.0 grams per mole O2) by the number of moles (1.5 mole) to get its mass (48.0 grams for 1.5 mole O2)
Calculate the mass of 0139 moles of copper?
Mass = moles x formula mass Mass = 0.139 x atomic mass of copper (63.5) Mass = 8.83g
