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Chemistry
Atoms and Atomic Structure
Molecular Mass

How do we get moles from mass?


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Answered 2015-07-24 16:55:21

Calculate:

mass/molar mass = moles

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Answered 2016-02-25 13:27:22

We need molarmass for it. divide mass fromthe molar mass.

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To convert mass to moles, you use the equation n= m/M n is moles, m is mass, M= Molar mass, which is the mass of the atoms in the formula or substance.


This formula is: moles = mass of the compound/molar mass of the componnd


to convert mass into moles you divide by the molar mass. You cannot convert molar mass directly to moles.


0.615 moles Because the 13 is Carbon's atomic mass so 13.0g/moles Moles=Mass/atomic mass Moles=8.00/13.0= 0.615 moles



By dividing the total mass of the number of moles that you are considering by number of moles; the result is the molar mass.


Number of moles = Total mass/Molar mass


Since molar mass of hydrogen is 1g , the no. of moles = mass of hydrogen given. or No. of moles= Given mass of substance/Molar mass of substance


moles=mass/Molar Mass 6.50=mass/98 mass=637g 6.5 moles of H2SO4 weighs 637g.


Atomic mass of Sulphur is 32 1 mole = Atomic mass of sulphur No. of moles = Given mass/ Atomic mass No.of moles= 5/32 0.15 moles


Moles = mass/molar mass = 1/197 = 0.005 moles


No of moles= given mass/molecular mass = 600/30= 20 moles



no. of moles = mass in g/mass of one mole no. of moles = 28.52/174.3 no. of moles = 0.16363 mol (rounded)


the number of moles is mass in grams divided by relative mass example how many moles are there in 42g of carbon? answer 42 / 12 = 3.5 moles mass in grams divided relative mass = number of moles


number of moles = mass/molecular mass. = 24/12 = ~2 moles


molar mass =207.2 g / mol no. moles = mass/ molar mass moles = 1 1(207.2) = mass mass of 1 mole lead is 207.2g molar mass =207.2 g / mol no. moles = mass/ molar mass moles = 1 1(207.2) = mass mass of 1 mole lead is 207.2g


The mass of 2 moles of HgO is 433 g.


The mass of 0,005 moles of paradichlorobenzene is ,735 g.


The mass of 4,00 moles of iron is 223,38 g.


The mass of 2,1 moles H2O is 37,8 g.


The mass of 0,5 moles of water is 9 g.


The mass of 2,75 moles of water is 49,5 g.


What is the mass of 0.25 moles of aluminum sulfate


The mass of 5 moles Fe2O3 is 798,45 g.



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