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3 years ago

14

Solutions that have more h than oh- ions are

2 answers:

erik [133]3 years ago

6 0

Answer:

c. acids.

Explanation:

Acids are substances that have more positive hydrogen ions (H) or protons (cations or anions) than hydroxyl ions (OH) in an aqueous solution; For this reason, they are known as “proton donors”.

In addition, acids react with bases, forming salts and water in a reaction called a "neutralization reaction".

In addition to the prevalence of hydrogen ions in their composition, acidic substances are colorless, have a strong suffocating odor, sour, acidic or bitter taste, pH below 7. low boiling point, conduct electricity in aqueous medium. and react with metals such as iron, magnesium and zinc.

mestny [16]3 years ago

5 0

They are Acids

when acids are in water they dissociate and release H+ ions into the water

while bases release OH- ions

hope that helps

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3 years ago

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sp2606 [1]

Answer:

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Explanation:

To know how many years old is the watch we need to use the following equation:

$I_{(t)} = I_{0}e^{-\lambda t}$ (1)

Where:

$I_{(t)}$ : is the brightness in a time t = (1/10)I₀

$I_{0}$ : is the initial brightness

λ: is the decay constant of tritium

The decay constant is given by:

$\lambda = \frac{ln(2)}{t_{1/2}}$ (2)

Where:

$t_{1/2}$ : is the half-life of tritium = 12.3 years

By entering equation (2) into (1) we have:

$I_{(t)} = I_{0}e^{-\lambda t} = I_{0}e^{-\frac{ln(2)}{t_{1/2}}t}$

$\frac{I_{(t)}}{I_{0}} = e^{-\frac{ln(2)}{t_{1/2}}t}$

By solving the above equation for "t" we have:

$ln(\frac{I_{(t)}}{I_{0}}) = -\frac{ln(2)}{t_{1/2}}t$

$t = -\frac{ln(\frac{I_{(t)}}{I_{0}})}{\frac{ln(2)}{t_{1/2}}} = -\frac{ln(\frac{1}{10})}{\frac{ln(2)}{12.3}} = 40.9 y$

Therefore, the watch is 40.9 years old.

I hope it helps you!

7 0

3 years ago