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3 years ago

Does anyone know the answer?????

Chemistry

1 answer:

Juli2301 [7.4K]3 years ago

3 0

Answer:

In chemistry, pH (/piːˈeɪtʃ/) (abbr. power of hydrogen or potential for hydrogen) is a scale used to specify how acidic or basic a water-based solution is. Acidic solutions have a lower pH, while basic solutions have a higher pH.

Explanation:

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A microwave operates at 7.42 mm wavelength. How much energy is produced in Joules from 359 photons?

alisha [4.7K]

Answer:

$E=9.62\times 10^{-21}\ J$

Explanation:

Given that,

The wavelength of a microwave is 7.42 mm or 0.00742 m

No. of photons, n = 359

We need to find the energy produced by this no of photons. It can be given by the formula as follows :

$E=\dfrac{nhc}{\lambda}\\\\E=\dfrac{359\times 6.63\times 10^{-34}\times 3\times 10^8}{0.00742}\\\\=9.62\times 10^{-21}\ J$

$E=9.62e^{-21}\ J$

So, the required energy is $9.62\times 10^{-21}\ J$ .

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3 years ago

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If 85.0 L of helium at 29.0°C is compressed to 32.0 L at constant pressure, what is the new temperature?

Feliz [49]

Answer:

113.69°k

Explanation:

V1=85L of helium V2=32L

T1= 29°C +273= 302°K T2=?

T2=<u>TIV2</u>

T2=<u>(302)(32)</u>= <u>9664</u>

85 85

T2= 113.69°K

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3 years ago

Ronaldo experimentally determined the

Yuri [45]

Answer:

Explanation:

%error= error/actual density x100

0.050/0.890 x100

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3 years ago

Where does the waste materials in the body come from and why does the body need to get rid of these waste materials

Olin [163]

The waste materials are food and bacteria that were inside your digestive system.

The body has to get rid of them, if it didn't you would just be pilling up a bunch of waste materials in your stomach.

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3 years ago

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Depending upon the tip of a dropper pipet there are approximately 20 drops per milliliter of water. the experimental procedure p

Murrr4er [49]

Answer : The volume range in milliliters for the solution is 0.25 - 0.5 mL

Explanation :

We have been given that there are approximately 20 drops per milliliter of water

This information can be used as a conversion factor as $\frac{1mL}{20 drops}$

We are using 5-10 drops of the solution.

Let us calculate milliliters in 5 drops.

$5 drops \times\frac{1 mL}{20 drops} = 0.25 mL$

Similarly, 10 drops would contain

$10 drops \times\frac{1 mL}{20 drops} = 0.5 mL$ solution.

Therefore the volume range in milliliters for the solution is 0.25 - 0.5 mL

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3 years ago

Does anyone know the answer?????​

Does anyone know the answer?????