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# Calculating Mass and Moles

GIVEN INFO:
from an unknown bottle:
Unknown= #25
Metal present= Na
Mass% metal= 43.88%

Atomic masses:
Cl= 35.453g
O= 16.0g
C= 12.0g
H= 1.00g

1. Mass of crucible and cover= 32.493g
2. Mass of crucible, cover, and unknown=33.001g
3. Mass of crucible, cover, and solid chloride= 33.017g
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Here is the information that I need to know (with significant figures).

1. mass of unknown
2. mass of solid chloride
3. Mass of metal in the unknown
4. number of moles of metal
5. Mass of Cl- in solid chloride
6. Moles of Cl- in solid chloride
7. Mole ratio in solid chloride (metal to chloride and not to the nearest integer)
8. Mole ratio in solid chloride (metal to chloride and to the nearest integer)
9. Formula of solid chloride
10. Mass of carbonate or hydrogen carbonate groups in unknown
11. Molar mass of group
12. Number of moles in unknown (IF it is a carbonate)
13. Molar mass of H group
14. Number of moles H in unknown (IF it is a hydrogen carbonate)
15. Mole ratio: [ Cl- in solid chloride to in unknown]
OR
[Cl- in solid chloride to H in unknown]
16. The mole ratio to the nearest integer from question 15
17. Formula of the unknown

#### Solution Summary

The solution calculates the mass and moles given the atomic masses of different elements.

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