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3 years ago

Lakes, rivers, or springs can form when:

Chemistry

2 answers:

adell [148]3 years ago

5 0

Answer:

D.) rain water seeps into the ground

Explanation:

Obviously?

Verdich [7]3 years ago

3 0

I think it’s B if not D Good luck :)

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A certain shade of blue has a frequency of 7.18 × 1014 Hz. What is the energy of exactly one photon of this light?

timurjin [86]

E=hv h = 6.626 × 10^-34 joule·s v=frequency i got 4.7636x10^-30 J

3 0

3 years ago

Consider the following unbalanced redox reaction:

Olegator [25]

Mn04 is being reduced

5 0

3 years ago

g A hydrogen atom initially in the n = 4 states emits a photon and makes a transition to the n = 2 level. What is the wavelength

Vinil7 [7]

<u>Answer:</u> The wavelength of the photon is 486.2 nm and it lies in the visible region

<u>Explanation:</u>

To calculate the wavelength of light, we use Rydberg's Equation:

$\frac{1}{\lambda}=R_H\left(\frac{1}{n_i^2}-\frac{1}{n_f^2} \right )$

Where,

$\lambda$ = Wavelength of radiation

$R_H$ = Rydberg's Constant = $1.097\times 10^7m^{-1}$

$n_f$ = Higher energy level = 4

$n_i$ = Lower energy level = 2

Putting the values in above equation, we get:

$\frac{1}{\lambda }=1.097\times 10^7m^{-1}\left(\frac{1}{2^2}-\frac{1}{4^2} \right )\\\\\lambda =4.862\times 10^{-7}m$

Converting this into nanometers, we use the conversion factor:

$1m=10^9nm$

So, $4.862\times 10^{-7}m\times (\frac{10^9nm}{1m})=486.2nm$

As, the range of wavelength of visible light is 400 nm - 700 nm. So, the wavelength of the given photon lies in the visible region

Hence, the wavelength of the photon is 486.2 nm and it lies in the visible region

6 0

3 years ago

If alcohol is ingested rapidly, the _____ will rise sharply within twenty minutes. blood pressure ABC LD50 BAC

GaryK [48]

The Blood Alcohol Level (BAC) will rise. Because it usually peaks about 30 minutes after drinking, a sharp spike at 20 minutes makes sense.

BAC.

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4 years ago

If 0.4506 g of KHP standard were titrated with NaOH and the endpoint was reached at 27.96 mL, what is the concentration (molarit

Lemur [1.5K]

Answer is in attachment.

Enjoy :)

6 0

3 years ago