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Mashcka [7]
3 years ago
12

How long would it take for a car to travel a distance of 275 km if it is traveling at a

Chemistry
1 answer:
Rainbow [258]3 years ago
5 0

Answer:

5 hours

Explanation:

Given:

Distance = 275 km

Speed = 55 km/h

speed =  \frac{distance}{time}

time =  \frac{distance}{speed}

time = \frac{275}{55}

time = 5

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Does anyone know the answer?
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A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.05 nm. It then gives off a photon having a wave
vodka [1.7K]
Absorbed photon energy
Ea = hc/λ.. (Planck's equation)
Ea = hc / 92.05^-9m 

<span>Energy emitted
Ee = hc/ 1736^-9m </span>

Energy retained ..
∆E = Ea - Ee = hc(1/92.05<span>^-9 - 1/1736^-9) </span>
<span>∆E = (6.625^-34)(3.0^8) (1.028^7)
∆E = 2.04^-18 J </span>

<span>Converting J to eV (1.60^-19 J/eV)
 ∆E = 2.04^-18 / 1.60^-19
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<span>Ground state (n=1) energy for Hydrogen = - 13.60eV </span>

<span>New energy state = (-13.60 + 12.70)eV = -0.85 eV </span>

<span>Energy states for Hydrogen
En = - (13.60 / n²) </span>

n² = -13.60 / -0.85 = 16
n = 4
4 0
3 years ago
Help with this question for chemistry!!
wel
Emperic formula is SO subscript 2. Molecular formula would be SO subscript 2 multiply 1 so it's the same answer.
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WILL GIVE BRAINLIEST TO THE BEST ANSWER, AND PLEASE GIVE EXPLANATION!
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3 years ago
WILL GIVE BRAINLIEST TO PERSON WHO ANSWERS FASTEST AND CORRECT BUT ANY ANSWERS TO JUST GET POINTS WILL GET REPORTED AND DELETED
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Answer:

B

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