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FinnZ [79.3K]
3 years ago
13

Metals are{blank}because light reflects off the electrons.

Chemistry
2 answers:
Snezhnost [94]3 years ago
5 0

Answer:

shiny

Explanation:

Talja [164]3 years ago
3 0

Answer:

shiny

Explanation:

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Which of the following is NOT an example of a chemical change?
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B) Water evaporates into steam.

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The molecular structure of water contains two atoms of hydrogen and one atom of oxygen . When water reaches its boiling point an
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The concentration of hydroxide ions is greater than the concentration of hydronium ions for acidic solutions.
Katena32 [7]

Answer:

True

Explanation:

It's true because the pH is a measure of how basic or acid a solution is. In an acidic medium, the pH scales goes from 0 to 7. While in a basic medium goes from 7 to 14. The lower the pH value of the most acid the solution is.

1. The expression pH = -log(molar concentration of hydronium) allow to calculate the pH of a solution.

2. On the other hand, the expression pOH = -log(molar concentration of hydroxide) allow to determine the pOH of a solution.

The values of pH and pOH always obey the following expression:

pH + pOH = 14

Thus if for instance the pH becomes smaller the pOH must become bigger in order to fulfill the equation. Which means that the concentration of hydronium ions is greater than the hydroxide concentration.

For example, in an acidic medium:

if pH= 3, pOH= 11

In this case the molar concentration of hydronium is 0,001M. And the molar concentration of hydroxide ions is just 0,00000000001M.

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3 years ago
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