2.3456 grams lead (1 mole Pb/207.2 grams)
= 0.01132 moles of lead
=================
9,51.103 g Pb is equivalent to 45,9 moles.
Calculate the mass in grams of 2.3456 mol of lead
0.01132 moles
3.4 X 10^24 Pb atoms (1 mole Pb/6.022 X 10^23) = 5.6 moles of lead
1 mol Pb = 207.2 grams 12.4 mol Pb = ? grams (cross multiplication) mass of (12.4 mol Pb) = (207.2 gr *12.4 mol) / (1mol) = 2569.28 g
This element is carbon.
A 42.7 gram sample of potassium nitrate (KNO3) contains how many grams of potassium?
3Pb(NO3)2 + 2AlCl3 = 3PbCl2 + 2Al(NO3)3 Is the balanced equation.If there are 8 moles of ALCl3 used instead of 2, the number of moles need of the first reactant needed will be 6 moles.The new balanced equation is: 6Pb(NO3)2 + 8AlCl3 = 6PbCl2 + 8Al(NO3)3
A lot! 9.51 X 103 grams Pb (1 mole Pb/207.2 grams) = 45.9 moles of lead ===============
89 grams of Pb(CH3COO)4 is equal to 0,2 moles.
0.25 Pb(NO3)2 + CuSO4 --> PbSO4 + Cu(NO3)2 stoichiometry is 1:1 for Pb(NO3)2 : CuSO4
3.4 X 10^24 Pb atoms (1 mole Pb/6.022 X 10^23) = 5.6 moles of lead
That is equal to 0.65 (mol Pb) * 207.2 (g/mol Pb) = 135 grams Pb 207.2 = molar mass of Pb, lead.
For this you need the atomic mass of Pb. Take the number of moles and multiply it by the atomic mass. Divide by one mole for units to cancel..0015 moles Pb × (207.2 grams) = .311 grams Pb
Pb molecular weight is 207.2 g/mol. 33.3 moles of Pb weighs 6899.76 grams.
2.16 X 1024 atoms lead (1 mole Pb/6.022 X 1023) = 3.59 moles of lead ==============
there are 6.022 x 1023 atoms in 1 mole, so if you have 6.755 moles of Pb that would be be 6.755(6.022 x 1023) which is 4.067861 x 1024 atoms
6.755 moles lead (6.022 X 1023/1 mole Pb) =6.755 x 6.022 X 1023 =4.068 X 1024 atoms of lead =====================
Using the formula number of moles = mass divided by molar massso mass = number of moles X molar massFind molar mass by adding up the masses of all the atoms in your substance.A good way to remember this is as the formula g/mw = moles, and the mnemonic for this is"Mine workers (mw= molecular weight) under ground (grams of compound you are dealingwith = Moles!
1 mol Pb = 207.2 grams 12.4 mol Pb = ? grams (cross multiplication) mass of (12.4 mol Pb) = (207.2 gr *12.4 mol) / (1mol) = 2569.28 g