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butalik [34]
3 years ago
11

Does washington england costa rica or south africa have warmest ocean surface water

Chemistry
1 answer:
luda_lava [24]3 years ago
6 0
Cape town, South Africa
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The blue colour of the sky results from the scattering of sunlight by air molecules. Blue light has a frequency if about 7.5*10^
erastovalidia [21]

Answer: The energy of a mole of photon associated with this frequency is 49.5\times 10^{-20}J

Explanation:

The energy and frequency are related by :

E=N\times h\times \nu

E = energy of photon

N = number of moles = 1

h = planks constant = 6.6\times 10^{-34}Js

\nu = frequency = 7.5\times 10^{14}Hz

E=1\times 6.6\times 10^{-34}Js\times 7.5\times 10^{14}s^{-1}=49.5\times 10^{-20}J

The energy of a mole of photon associated with this frequency is 49.5\times 10^{-20}J

6 0
3 years ago
Which one is a Synthesis reaction?​
sveta [45]

Answer:

the second one is synthesis reaction

3 0
2 years ago
Calculate the number of moles in 7g of nitrogen gas​
Andru [333]

Answer:

<h3>0.2498molN_{2}</h3>

Explanation:

7gN2 x \frac{1 mol}{2(14.01) g}

=0.2498mol N2

Nitrogen gas has the formula N_{2} so therefore that means you would have to multiply the mass in the molar by 2. To solve for the number of moles you need to cancel out the grams, you do this by using the molar mass of nitrgoen gas. You get the value on in the denominator from the periodic table (atomic mass of element). The grams will cancel out, leaving you with the number of moles when you divide 7/2(14.01).

5 0
3 years ago
HELPPPP ANSWERSS!!!<br><br> A. <br> 13<br><br> B. <br> 8<br><br> C. <br> 15<br><br> D. <br> 5
KATRIN_1 [288]

Answer:

C

Explnation:

D

4 0
3 years ago
Which of the following is true about an atom of silver
kati45 [8]

Answer:

where is options.

tell me

4 0
3 years ago
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