Answer: 6.0 moles
Explanation:
1) The information in the quesiton is incomplete.
2) The question is bases on a voltaic cell in which the reactants are
Al (NO₃) ₃ (aq) + Ni (NO₃) ₂ (aq).
3) And you are also given the net ionic reaction:
2Al(s) + 3Ni²⁺ (aq) → 2Al₃ (aq) + 3Ni(s)
4) It is from the net ionic reaction that you get the ration between Al and Ni:
2 moles of Al react with 3 moles of Ni, so you can state the proportion:
2 moles Al / 3 moles Ni = x / 9.0 moles Ni
5) So, you just must solve for x:
x = 9.0 moles Ni × 2 moles Al / 3 mols Ni = 6.0 moles Al
Answer:
When the results of a new experiment to test atomic theory do not agree with the theory, scientist will repeat the experiment to make sure that his results are reliable.
Explanation:
In the scientific context, each new experiment must be performed with precision and following the steps of the scientific method.
An experiment that does not provide reliable data to demonstrate a theory must be reviewed in detail and performed again to confirm the data obtained in the first attempt.
A theory is a postulate that tries to explain a natural phenomenon, but whose argument can be discussed or does not have the acceptance of a law. When the theory is proven and there are no arguments against it, it can be universally accepted and becomes a law.
The other options are not valid due to:
- <u><em>Scientists worldwide will reject atomic theory because of the new results</em></u><em>. A theory cannot be discarded without solid arguments or evidence in order to dismiss it and establish a new one.</em>
- <u><em>The scientist will change his results to agree with the accepted theory</em></u><em>. This would be an unethical procedure and unacceptable to the scientific community.</em>
- <em><u>Other scientists will reject the results because they do not agree with the theory</u></em><em>. The opinion of other scientists is not enough to dismiss a theory, if it has a valid scientific basis.</em>
Answer:
Numbers 4,3
Explanation:
Ionic bond is between nonmental and metals
<span>It was Rutherford who discovered that the positive charge part of the atom.
</span><span />
