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laiz [17]
2 years ago
15

2. The color of blue light has an energy (E) of 6.62 x 10-19 J. What is the

Chemistry
1 answer:
malfutka [58]2 years ago
8 0
67.45 is the answer I think
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Convert 15.6 g Na2Cr2O7 to moles of Na2Cr2O7.
Leviafan [203]

Answer:

261.96754

Explanation:

3 0
3 years ago
An acidic fog in pasadena was found to have a ph of 2.50. which expression represents this ph measurement?
joja [24]

Supposing a temperature of 25 degrees and supposing that all activity coefficients are 1 

pH = -log[H+] 
pOH = -log[OH-] 
pH + pOH = 14 

Thus a pH of 2.50 would mean that the [H+], the concentration of the hydrogen ion, would be 10^(-2.50) 

pH + pOH = 14 
pOH = 14 - pH = 14 - 2.5 = 11.5 
MOH- levels would be coordinated with pOH 
pOH = -log[OH-] ==> [OH-] = [MOH-] = 10^-pOH = 10^-11.5 = 3.2 x 10^-12 

Therefore, MOH¯ = 3.2 × 10¯12 M 

5 0
3 years ago
Truebor false is a substance is made of equal parts,the substance is knowns as complex substance
Alex
False i think im not sure
6 0
3 years ago
1b<br>Describe the terms below:<br>2. adiabatic process​
Ugo [173]

Answer:

defined as a process in which mo heat transfer take place

Explanation:

is a process which occurs without transferring heat /mass between the system and it's surrounding.

8 0
3 years ago
Calculate the frequency in hertz of electromagnetic radiation that has a wavelength of 645.0 nm. (c = 3.00 X 10⁸ m/s)
bazaltina [42]

Answer:

1/wavelength

c=1/alpha

6 0
3 years ago
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