Antimony has a molar mass of 121.757 (g/mole).
Since one mole weighs 121.757 g, multiply this mass by 7.20.
=852.299 grams
If it is pure gold, then it should weigh 1376,65983 g.
jc
The molar mass of N2 is 2*14.01 = 28.02 g/mol
The molar mass of potassium sulfide is approximately 110 g/mol.
Grams liquid × mol/g × Hfusion
in order to find the mass of H20 you need the molar mass which is 18.01g/mol and to calculate the mass you just multiply by the number of moles. 18.01 * .20 = 3.60g
17g/mol to calculate it out. you have to times the Average atomic mass (amu) but the amount of atoms. so nitrogen: 14*1 and hydrogen: 1*3. then add them together. it comes out to 17, so you put that into g/mol. and there you have 17g/mol.
The atomic mass of Aluminum Sulfide is 150.158 g/mol
Tin (Sn) Molar Mass = 118.71 g/mol
174.259 g/mol
The molar mass of NaOH is 39.9 g/mol, so if you multiply is by 2.5, you get the answer. 99.75 g/mol
Calculate the mass (in grams) of sodium sulfide that is needed to make 360ml of a 0.50 mol/L solution
You would first calculate the atomic mass of chlorophyll, which would be 892.9 g/mol (I did not calculate this out, but looked it up b/c of the complexity of the calculation). Then find the molar mass of the Nitrogen part of the chlorophyll (4 mol *14.01 g/mol=56.04 grams). Then, take 56.04 grams/892.9grams= .06276, or 6.276% nitrogen by mass
I believe it is: %O=mass of 3 mol of O / mass of 1 mol of potassium chlorate *100% If you measured it: %O=mass of oxygen lost / mass of potassium chlorate *100%
The molar mass of Al2O3 is 101.96 g/mol. To calculate the mass of 9.27 moles of Al2O3, you would multiply the moles by the molar mass: 9.27 mol x 101.96 g/mol = 945.442 g. So, the mass of 9.27 moles of Al2O3 is approximately 945.442 grams.
The molar mass of N2 is 2*14.01 = 28.02 g/mol
Mass of hydrogen = 1 g/mol Mass of oxygen = 16 g/mol There are 2 hydrogen in H2O2 and 2 oxygen in H202, so (1x2) + (16x2) = 34 g/mol
The molar mass of potassium sulfide is approximately 110 g/mol.
Antimony (Sb) has an atomic weight of 121.760g/mol