Answer:
2.0 x 10²³ atoms Au = 65.4g
1.5 x 10²³ atoms Pb = 51.6g
7.9 x 10²¹ atoms U = 3.1g
Explanation:
We want to convert each to grams.
We can use dimensional analysis to do so.
Kindly view the attached image for work.
1.) 2.0 x 10²³ atoms Au
Needed conversions:
- 1 mole = 6.022 x 10²³ atoms
- 1 mole of Au = 196.966g
Math: (2.0x10²³atoms)/(6.022x10²³atoms) x 196.966g = 65.4g
2.) 1.5 x 10²³ atoms lead
Needed conversions:
- 1 mole = 6.022 x 10²³
- 1 mole Au = 207.2g
Math: (1.5x10²³atoms)/(6.022x10²³atoms) x 207.2g = 51.6g
3.) 7.9 x 10²¹ atoms U
Needed conversions:
- 1 mole = 6.022 x 10²³ atoms
- 1 mole = 238.029g
Math: (7.9x10²¹atoms)/(6.022x10²³atoms) x 238.029g = 3.1g
