In order to get the number of moles of a substance when given the mass of the substance you must divide the mass in grams by the molar mass of the substance, which for aluminum is 26.98. So the answer is 27/26.98 = 1.0007, which would be rounded to 1.0 mol.
The answer is in the question itself, although the end of the question should read "aluminum-29". When the name of an isotope is written in this manner, the number after the hyphen is the mass number of the isotope.
m=29 g M(Al)= 27 g.mol-1 nAl=m/M=29/27=1.074 moles N= number of atoms NA= Avogadro's number= 6 x 1023 n=N/NA N=n x NA = 1.074 X 6 X 1023= 6.4 X 1023 atoms.
27 g of Al has 6.023 x 1023 atoms.So, 23 g of Al will have 5.131 x 1023atoms.
9÷24=0.33333mol 0.33333 x 6.022 x 10^22 Number of atoms=2.0073x10^22
1,46 moles of aluminum fluoride contain 35,16848.10e23 atoms.
3.20 moles aluminum (6.022 X 1023/1 mole Al) = 1.93 X 1024 atoms of aluminum -------------------------------------------
2,89 moles of aluminium contain 17,40398707673.1023 atoms.
2 moles of benzene gives 12 moles of hydrogen atoms since benzene is C6H6
0.0845 moles of tungsten is equal to 0,50887.10e23.
1,46 moles of aluminum fluoride contain 35,16848.10e23 atoms.
Aluminum sulfide has a molar mass of 150.16 grams per mole. This means there are 0.666 moles present, or 4.01 E23 molecules. Each molecule of Al2S3 has 2 aluminum atoms, so there are 8.02 E23 atoms of aluminum present.
3.20 moles aluminum (6.022 X 1023/1 mole Al) = 1.93 X 1024 atoms of aluminum -------------------------------------------
2,89 moles of aluminium contain 17,40398707673.1023 atoms.
Pieces of atoms? 6.01024 atoms of aluminum (1 mole Al/6.022 X 10^23) = 9.98047 X 10^-24 moles of aluminum ---------------------------------------------------
44 moles of atoms
The Answer is.56 moles OR 0.56 moles
9
4,80 moles of Fe contain 28,9062761136.10e23 atoms.
Aluminium Oxide(Al2O3) has 2 moles of aluminum and 3 moles of oxygen. The total is 5 moles. One mole is 6.022 x 1023 atoms. Therefore, 5 moles = 30.110 x 1023 atoms
2,2 moles of plutonium: 13,248711938.1023 atoms.
2 moles of benzene gives 12 moles of hydrogen atoms since benzene is C6H6