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Chemistry, paper chromatography
Select all that apply about the scientific method.
| a. |
Involves observing the results of experiments. |
|
| b. |
None of These |
|
| c. |
Involves using others’ experimental data to make conclusions. |
|
| d. |
Involves the testing of conclusions with additional experiments. |
|
| e. |
Involves making conclusions about observations |
Show ALL work using proper dimensional analysis as presented in class.
A sample in the lab was weighed on an analytical balance. The mass weighed was 1885.676 mg. Find the mass of the sample:
a.) In grams
b.) In micrograms
c.) In pounds.
What is the average atomic mass of Copper given the two Isotopes copper-63, which is present in 69.17% and copper-65, which is present in 30.83% of the copper atoms.
| a. |
63.05 amu |
|
| b. |
63.55 amu |
|
| c. |
64.00 amu |
|
| d. |
64.55 amu |
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