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slava [35]
3 years ago
10

What would you use if you needed to measure the volume of an object?

Chemistry
1 answer:
tangare [24]3 years ago
4 0
Are there any answer choices?

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The quantum yield of light-induced chemical reactions (called photochemical reactions) measures the efficiency of the process. T
marissa [1.9K]

Answer:

1.9×10^20

Explanation:

ϕ = number of reaction events /number of photons absorbed

ϕ= 0.26

Energy= power× time

885×10^-3×10×60= 531J

But E= nhc/λ

n= number of photons

h= planks constant

c= speed of light

λ= wavelength

n= Eλ/hc

n= 531×280×10^-9/6.6×10^-34 ×3×10^8

n= 7.5×10^20

Therefore

From

ϕ = number of reaction events /number of photons absorbed

Number of reaction events= 0.26×7.5×10^20

= 1.95×10^20

3 0
4 years ago
3)<br> How many atoms are in 14 moles of cadmium?
andre [41]

Answer:

8.4322\times10^{24} atoms atoms are in 14 moles of cadmium.

Explanation:

Cadmium is a white and  silvery  metal  that is found in the curst of the earth.During the  production process of metals such as lead, copper, zinc, cadmium is extracted

Cadmium is present in some foods and is emitted when fossil fuels like as coal and oil is used, smoking cigarettes. It is used in craft glazes, metal batteries, and coatings.

We know that 1 mole of  Cadmium (Cd contains) 6.023*1023 atoms, which is Avogadro's number.

So in 14 Grams of Cadmium, the number of atoms present is,

=>14×number atoms present in one cadmium atom

=>14\times 6.023\times10^{23}

=>8.4322\times10^{24} atoms

5 0
4 years ago
Lipids with high polyunsaturatd fatty acid content are ____________ at room temperature.
kow [346]
The answer to this question would be liquid.

<span>Lipids with high polyunsaturated fatty acid mostly found as a liquid, but the saturated one would be solid at room temperature. A molecule with higher molecular weight will have the higher boiling point and it more likely to be solid at room temperature.
Unsaturated fat is more healthy than saturated fat and it is recommended to reduce saturated fat consumption as it was linked to many diseases.

</span>
7 0
4 years ago
Considering the combustion reaction of propane again, what mass of propane (C3Hg) is necessary to react with 4.53 g of oxygen? C
zimovet [89]

Answer:

1.25 g C3H8

Explanation:

edge lol

7 0
2 years ago
If a log is burning and the amount of oxygen reaching he log is decreased what happens
forsale [732]
The log is using wood for fuel

5 0
4 years ago
Read 2 more answers
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