a sample of phosphorous has 0.5 moles of P4 molecules
1]how many P4 molecules are there?
2]how many P atoms are there?
3]how many moles of P atoms are there in the sample?
4]what is the mass of the sample?
1) To determine how many P4 molecules there are in the sample, you can use Avogadro's number. Avogadro's number is approximately 6.022 x 10^23 particles per mole.
Given that there are 0.5 moles of P4 molecules in the sample, you can calculate the number of P4 molecules by multiplying the number of moles by Avogadro's number:
Number of P4 molecules = 0.5 moles x (6.022 x 10^23 molecules/mole)
2) Each P4 molecule contains 4 P atoms. So, to calculate the number of P atoms in the sample, you can multiply the number of P4 molecules by 4:
Number of P atoms = Number of P4 molecules x 4
3) To determine the moles of P atoms in the sample, you need to use the concept of stoichiometry. Since each P4 molecule contains 4 P atoms, the number of moles of P atoms in the sample is the same as the number of moles of P4 molecules:
Moles of P atoms = 0.5 moles
4) To calculate the mass of the sample, you'll need to know the molar mass of phosphorus. The molar mass of phosphorus (P) is approximately 30.97 g/mol.
Mass of the sample = Moles of P atoms x Molar mass of phosphorus (P)
I can help you with further calculations if needed.
To answer these questions, we need to use the Avogadro's number and the molar mass of phosphorous. The molar mass of phosphorous (P) is approximately 31 grams/mol.
1] To find the number of P4 molecules in the sample, we can use Avogadro's number, which states that there are 6.022 x 10^23 entities (atoms, molecules, or formula units) in one mole of a substance. Since there are 0.5 moles of P4 molecules, we can calculate the number of molecules using the following formula:
Number of P4 molecules = (0.5 moles) x (6.022 x 10^23 molecules/mol)
2] Each P4 molecule contains 4 P atoms. So, to find the number of P atoms in the sample, we can multiply the number of P4 molecules by 4.
Number of P atoms = Number of P4 molecules x 4
3] To find the number of moles of P atoms in the sample, we divide the number of P atoms by Avogadro's number.
Number of moles of P atoms = (Number of P atoms) / (6.022 x 10^23 atoms/mol)
4] Finally, to calculate the mass of the sample, we multiply the number of moles of P atoms by the molar mass of phosphorous (P).
Mass of the sample = (Number of moles of P atoms) x (molar mass of P)
Using this information, you can now calculate the answers to the questions.
Answer
Note the correct spelling of phosphorus.
a.
A mole contains 6.02E23 molecules; therefore, there are 0.5 x 6.02E23 = ?
b.
Since there are 4 P atoms to 1 P4 molecules, there must be 4 x the number in a.
c.
You have 0.5 mole P4 molecules; there must be 4*0.5 = ? mols P atoms.
d.
grams = mols x molar mass = ?