Answer:
≈16.67 grams
Step-by-step explanation:
To solve this problem, we need to use the atomic mass of titanium to convert the number of atoms to grams. The atomic mass of titanium is 47.867 g/mol, which means that one mole of titanium atoms has a mass of 47.867 grams.
We are given the number of atoms of titanium, which is 2.1 x 10^23. We can use Avogadro's number to convert this to the number of moles of titanium:
2.1 x 10^23 atoms / (6.022 x 10^23 atoms/mol) = 0.349 moles
Now we can use the molar mass of titanium to convert moles to grams:
0.349 moles x 47.867 g/mol = 16.67 grams
Therefore, 2.1 x 10^23 atoms of titanium have a mass of approximately 16.67 grams.