There are approximately 160 grams in 1 mol of fe203 molecules therefore there would be 79/160 = 0.49375 mols of fe203 molecules in 79 grams therefore 5 atoms in total for each molecule of fe203 therefore 79/160 *5 =79/32=2.46875 mols in atoms
Its only asking for the mass of the compound P2O5. Basically add the elements' molar mass.
Molar mass of Phosphorus: 30.97
Molar Mass of Oxygen: 16
There is 2 atoms of phosphorus, so you multiply its mass by 2. 30.97 x 2
There is 5 atoms of oxygen, so you multiply its mass by 5. 16 x 5
Then add both masses.
The answer is <span>141.94g/mol P2O5</span>
Answer:
24 hours
Explanation:
There are 24 hours in a day cause that is how long for the earth to spin on its axis
the control rods absorb extra neutrons keeping them from causing to many uranium atoms to split to quickly.
Answer:
a) 5.4 * 10^-4 moles
b) 8.2 moles
c) 0.26 moles
d) 20.76 moles
Explanation:
a)Since 1 mole of a substance has 6.02 * 10^23 atoms
x moles is present in 3.25 x 1020 atoms of lead
3.25 x 1020 atoms of lead/6.02 * 10^23 atoms = 5.4 * 10^-4 moles
b) Since 1 mole of a substance has 6.02 * 10^23 molecules
x moles is present in 4.96 x 1024 molecules of glucose
x = 4.96 x 1024 molecules of glucose/6.02 * 10^23 molecules = 8.2 moles
c) Since 1 mole of a substance has 6.02 * 10^23 formula units
x moles is present in 1.56 x 1023 formula units of sodium hydroxide
x = 1.56 x 1023 formula units /6.02 * 10^23 = 0.26 moles
d) Since 1 mole of a substance has 6.02 * 10^23 ions
x moles is present in 1.25 x 1025 copper(ll) ions
x = 1.25 x 1025 copper(ll) ions/6.02 * 10^23 ions = 20.76 moles