DATA AND CALCULATIONS Sample 1
Sample 2
1.008 g
1. Mass of sample
2. Mass of filter paper,
funnel top, copper, and beaker
118.1968
3. Mass of filter paper,
funnel top, and beaker
| 117.670 g
63.55
4. Mass of copper
5. Percent of copper in sample
6. Molar mass of sample
7. Average molar mass of sample
Calculations: Show all work.
1. % Cu in sample 1:
2. Formula mass of sample 1:
3. % Cu in sample 2:

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

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Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.