How many moles of titanium are in a sample containing 2.8 x 10^24 atoms?
1) 1.69 x 10^48
2) 4.65 x 10^43
3) 4.65
4) 0.0465
5) 48
There are 6.02E23 atoms in a mole of atoms; therefore, ......
got 4.65, not sure if it's right
Of course it's right.
2.8E24 atoms x (1 mol atoms/6.02E23 atoms) = 4.65 mol.
To determine the number of moles of titanium in the given sample, you need to use Avogadro's number and the molar mass of titanium.
1) First, find the molar mass of titanium. The molar mass of titanium is 47.867 grams per mole.
2) Next, calculate the number of moles using the formula:
Number of moles = Number of atoms / Avogadro's number
Avogadro's number is equal to 6.022 x 10^23 atoms per mole.
Number of moles = (2.8 x 10^24 atoms) / (6.022 x 10^23 atoms per mole)
Using this calculation, you will find that the number of moles of titanium is approximately 4.65 moles.
Therefore, the correct option is 3) 4.65.