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Vikentia [17]
2 years ago
8

10) What is the energy of a photon whose frequency is 2.7 X 1014 Hz?

Chemistry
1 answer:
rjkz [21]2 years ago
4 0

Answer: c

Explanation:

E=hf

h = constant

f = frequency

E=(6.626x10^-^3^4J/s)(2.7x10^1^4Hz)\\E=1.78902x 10^-^1^9

moving the point 1 number to the right, and rounding up, leaves us with;

E=17.9x 10^-^2^0

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If a solution is given to you, how will you determine whether it is acid,base or salt​
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Answer:

If your lab has litmus paper, you can use it to determine your solution's pH. When you place a drop of a solution on the litmus paper, the paper changes color based on the pH of the solution. Once the color changes, you can compare it to the color chart on the paper's package to find the pH.

Explanation:

A solution's pH will be a number between 0 and 14. A solution with a pH of 7 is classified as neutral. If the pH is lower than 7, the solution is acidic. When pH is higher than 7, the solution is basic. These numbers describe the concentration of hydrogen ions in the solution and increase on a negative logarithmic scale.

For example, If Solution A has a pH of 3 and Solution B has a pH of 1, then Solution B has 100 times as many hydrogen ions than A and is therefore 100 times more acidic.

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What are some signs of cyanide poisoning visible on a corpse?
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Hello!
I saw this question and instantly knew I could help. I recently took a course on toxic gasses and poisons. Here's what I know.

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Effects and symptoms:
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If a near-lethal dose is absorbed through the skin, inhaled or swallowed the symptoms will include gasping for breath, dizziness, flushing, headache, nausea, vomiting, rapid pulse, and a drop in blood pressure causing fainting.
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<span>the famous bitter almond odor can be a clue and maybe noticeable at autopsy, but not everyone is capable of smelling it.

Hope this helped! :)</span>
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