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You must first find the molar mass of the element or compound. Use the Periodic Table (see the link to the left of the answer). If the chemical is an element, just read off the Atomic Mass from the periodic table. If it is a compound, you must know the molecular formula, and then you find the total molar mass of the compound by adding up the atomic masses of each atom in the compound. The unit of the molar mass will be in grams per moles (g/mole)
Once you have the molar mass, you can easily convert from grams to moles, and also from moles to grams.
Number of moles = (# of grams) / (molar mass)
Number of grams = (# of moles) * (molar mass)
Here are a two examples:
Example 1:
How many moles are in 5 grams of O2?
The molar mass of O2 = 16.00 g/mole x 2 (for 2 atoms of oxygen) or 32.00 g/mole.
5 g of O2 / (32 g/mole) = 0.15625 moles
Example 2:
How many grams does 4 moles of NH3 weigh?
The molar mass of NH3 = 14.01 + (3 * 1.01) = 17.04 g/mole
4 moles * 17.04 g/mole = 68.16 grams Grams in a MoleIn chemistry a mole is considered to be Avogadro's number (6.02 x 1023)of molecules (or atoms) of a substance - so depending on the density of the substance, the mass of that amount of the substance could vary widely.
One mole of hydrogen, for example, would have a different mass than one mole of lead. The question compares two different measurements of a given substance, rather like asking "how heavy is a gallon?". The question becomes "A gallon of what"?
*On the other hand, the Eastern Mole (Scalopus aquaticus) a small, burrowing mammal, weighs between 54 and 99 grams at adult size.
To convert grams to moles simply multiply the molar mass by the number of moles.
What else can I help you with?
How many moles are in a gram of carbon?
1 gram carbon (1 mole C/12.01 grams) = 0.08 moles carbon ===============
What would you multiply grams of germanium by to get the units moles of germanium?
The conversion factor you need for this problem is the atomic mass of germanium.72.6 gram germanium = 1 mole germaniumSince you want to end up in units of moles of Ge, this goes in the numerator (on top). You want to convert from grams Ge, so this goes in the denominator (on the bottom).grams Ge1 mole Ge = moles Ge72.6 gram Ge
How many grams in 238 moles of arsenic?
The conversion factor you need for this problem is the atomic mass of titanium.47.9 gram titanium = 1 mole titaniumSince you want to end up in units of grams of Ti, this goes in the numerator (on top). You want to convert from moles Ti, so this goes in the denominator (on the bottom).moles Ti47.9 gram Ti = grams Ti1 moles Ti
How many Cs atoms are there in a 53.7 gram sample of Cs?
This is a two-step calculation. First convert grams Cs to moles Cs. Then convert moles Cs to atoms Cs.The atomic weight of cesium is 133 g/mol1. To convert grams to moles:moles Cs= 53.7 g Cs1 mol = 0.404 mol Cs133 gMultiply by moles per gram. Grams cancel out.2. To convert moles to atoms:atoms Cs = 0.404 mol Cs6.02 x 1023 atoms = 2.43E+23 atoms CsmolMultiply by atoms/mole. Moles cancel out.
How many pounds-moles (lbmol) are equivalent to one gram-mole (gmol)?
One pound-mole (lbmol) is equivalent to approximately 453.6 gram-moles (gmol).
How do you calculate the gram molecular weight if you have 3.9176 grams and 0.122400 moles?
See the Related Questions to the left of this answer:"How do you convert from grams to moles and also from moles to grams?"
How many moles are in gram of NaOH?
moles = mass/Mr moles = 100/(23+16+1) moles of NaOH = 2.5mol
How do you convert the amount of a gas in solid form?
Change it's gram weight into moles using the periodic table.
How many moles are in 95.0 gram of octane?
how many moles are in 95.0 gram of octane?
How many moles are in a gram of carbon?
1 gram carbon (1 mole C/12.01 grams) = 0.08 moles carbon ===============
How many moles are there in 54 gram of water?
The answer is 3 moles.
What would you multiply grams of germanium by to get the units moles of germanium?
The conversion factor you need for this problem is the atomic mass of germanium.72.6 gram germanium = 1 mole germaniumSince you want to end up in units of moles of Ge, this goes in the numerator (on top). You want to convert from grams Ge, so this goes in the denominator (on the bottom).grams Ge1 mole Ge = moles Ge72.6 gram Ge
How many moles of sodium in 6.5 gram of sodium?
The answer is 0,111 moles.
What is the gram molecular mass of a compound if 5 moles of the compound has a mass of 100 grams?
To find the gram molecular mass of the compound, you can use the formula: mass = moles × gram molecular mass. Given that 5 moles of the compound have a mass of 100 grams, you can rearrange the formula to find the gram molecular mass: gram molecular mass = mass / moles. Thus, gram molecular mass = 100 grams / 5 moles = 20 grams per mole.
How many moles of lithium fluoride are in an 85.2 gram sample?
85.2 gram LiF sample is equivalent to 3,28 moles.
How do you convert molecules to gram?
You first divide the amount of molecules by avagadros number (6.022x10^23) to find out how many moles you have. Then you find out the molecular weight of the compound. You multiply the number of moles by the molecular weight to give you your weight in grams.
How many grams in 238 moles of arsenic?
The conversion factor you need for this problem is the atomic mass of titanium.47.9 gram titanium = 1 mole titaniumSince you want to end up in units of grams of Ti, this goes in the numerator (on top). You want to convert from moles Ti, so this goes in the denominator (on the bottom).moles Ti47.9 gram Ti = grams Ti1 moles Ti
