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lesya [120]
3 years ago
12

Calculate the frequency (in Hertz) of light with a wavelength of 420 nm. What color is the light?

Chemistry
1 answer:
BabaBlast [244]3 years ago
3 0
Speed of light is 3.0*10^8
frequency = wavelength / speed
= 1400 Hz
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If you have 1.5 grams of silver nitrate, how many grams of silver could<br> you produce?
Sunny_sXe [5.5K]

Answer:

0.95g of Ag we can produce

Explanation:

To solve this question we have to convert the mass of silver nitrate (AgNO₃) to moles. The moles of silver nitrate = Moles of Ag. Then, with molar mass of Ag we can know the mass of silver:

<em>Moles AgNO₃ -Molar mass: 169.87g/mol-:</em>

1.5g * (1mol / 169.87g) = 0.0088 moles Ag

<em>Mass Ag -Molar mass: 107.87g/mol-:</em>

0.0088 moles Ag * (107.87g / mol) =

<h3>0.95g of Ag we can produce</h3>
7 0
3 years ago
How many formula units are there in 7.55 moles potassium chloride?
Drupady [299]

Answer:

mole is equal to 1 moles Potassium Chloride, or 74.5513 grams.

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A solution at ph 10 contains __________ than the same amount of solution at ph 8.
Sindrei [870]

100 times less H+

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<h3>The pH scale: How does it function?</h3>
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  • The range is 0 to 14, with 7 representing neutrality.
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  • In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

<h3>How does the pH change when two acids are combined?</h3>
  • An acid's strength increases with the quantity of hydrogen ions it releases.
  • The pH of the strong acids is between 1 and 2.
  • We may observe that there is no response when two acids of the same strength are combined.
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<h3>How is pH value determined?</h3>

There are two ways to measure pH:

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brainly.com/question/491373

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8 0
2 years ago
The missing components in the table to the right
Fed [463]

The missing components in the table to the right are indicated with orange letters. Use the periodic table in the tools bar and this link Web Elements to fill in the corresponding values. A B C D E F G. 2. See answers. Log in to add ... F = 737.7kJ/mol. G = 495.8kJ/mol. Explanation: We are asked some of the ...

2 answers

4 0
3 years ago
A system gains 652 kJ of heat, resulting in a change in internal energy of the system equal to +241 kJ. How much work is done?
levacccp [35]

Answer:

-411 kj

Explanation:

We solve by using this formula

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This formula is the first law of thermodynamics

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Heat gained by system Q = 652

Putting the value into the equation

+241 = 652 + W

Workdone = 241 - 652

Workdone = -411 kj

Since work done is negative it means that work was done by the system

3 0
3 years ago
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