For this you need the atomic (molecular) mass of C3H4. Take the number of grams and divide it by the Atomic Mass. Multiply by one mole for units to cancel. C3H4=40.0 grams
10.0 grams C3H4 / 40.0 grams = .250 moles C3H4
10 grams C3H4 (1 mole C3H4/40.062 grams)(6.022 X 10^23/1 mole C3H4)
= 1.5 X 10^23 molecules
1o g ethanol is equivalent to 0,217 mol.
6.02 x 1024 molecules
8 grams of C3H4 contain 0,2 moles.
10 g x 1 mol/40 g = 0.25 moles
0.167 mol
No. of moles=wt. of substance/molecular wt. hence, wt. of substance= 2.38*100=238
95,474 moles
5mM = 0.005 moles 100 mL = 0.1 Liters Molarity = moles of solute/Liters of solution 0.005 M EDTA = X moles/0.1 Liters = 0.0005 moles EDTA =_____________ Now, look up the molecular formula for EDTA and find how many grams needed to add to your 100 mL.
moles = mass (g) divided by the molecular weight (g/mol) moles = 100g/12.01
By definition, one mole would be the same as the atomic mass. You take the number of moles and multiply it by the atomic mass. So if you have just 1 mole, the number of grams will be the atomic mass. Carbon's atomic mass is 12.011 grams.
if you have 100 liters how many moles does that equal?
4.00
100 grams MgCO3 (1mol MgCO3/84.32g) = 1.19 moles of MgCO3
For this you need the atomic (molecular) mass of NH3. Take the number of moles and multiply it by the atomic mass. Divide by one mole for units to cancel. NH3=16.0 grams100 grams NH3 / (16.0 grams) = 6.25 moles NH3
No. of moles=wt. of substance/molecular wt. hence, wt. of substance= 2.38*100=238
100 grams oxygen (1 mole O/16 grams)(2 mole Fe/3 mole O) = 4.17 moles iron --------------------------
100 millimoles is 0.1 moles. To convert moles to grams, you need to multiply by the molecular weight, in this case, 194.22g/mol. 0.1*194.22 is 19.422 grams.
Gold has a molar mass of 196.96655 grams per mole. 100 grams then is equal to .508 moles which makes 3.059 E23 atoms of gold.
95,474 moles
100/150.158 is 0.666 moles
5mM = 0.005 moles 100 mL = 0.1 Liters Molarity = moles of solute/Liters of solution 0.005 M EDTA = X moles/0.1 Liters = 0.0005 moles EDTA =_____________ Now, look up the molecular formula for EDTA and find how many grams needed to add to your 100 mL.
moles = mass (g) divided by the molecular weight (g/mol) moles = 100g/12.01