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3 years ago

Which value indicate the strongest base A. pH of 2 B. pH of 5 C. ph of 12 D. pH of 8

Chemistry

1 answer:

coldgirl [10]3 years ago

5 0

Explanation:

The highest number is the strongest base. Therefore the pH of 12 is the strongest base here (C).

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. A bright violet line occurs at 435.8 nm in the emission spectrum of mercury vapor. What amount of energy, in joules, must be r

Tom [10]

Answer : The energy released by an electron in a mercury atom to produce a photon of this light must be, $4.56\times 10^{-19}J$

Explanation : Given,

Wavelength = $435.8nm=435.8\times 10^{-9}m$

conversion used : $1nm=10^{-9}m$

Formula used :

$E=h\times \nu$

As, $\nu=\frac{c}{\lambda}$

So, $E=h\times \frac{c}{\lambda}$

where,

$\nu$ = frequency

h = Planck's constant = $6.626\times 10^{-34}Js$

$\lambda$ = wavelength = $435.8\times 10^{-9}m$

c = speed of light = $3\times 10^8m/s$

Now put all the given values in the above formula, we get:

$E=(6.626\times 10^{-34}Js)\times \frac{(3\times 10^{8}m/s)}{(435.8\times 10^{-9}m)}$

$E=4.56\times 10^{-19}J$

Therefore, the energy released by an electron in a mercury atom to produce a photon of this light must be, $4.56\times 10^{-19}J$

3 0

4 years ago

2. Compare and explain how an object's material and the light's frequency affect the way light is transmitted?

photoshop1234 [79]

Answer:

If the material is opaque, light is reflected or absorbed. If the material is transparent, all light is transmitted. If the material is translucent, the light is scattered. The higher the frequency, the more energy the light waves have. The lower the frequency, the less energy the light waves have.

Explanation:

I'm literally learning about it right now and I got it right.

4 0

3 years ago

The world's record in the 100 m dash is 9.69 seconds and in the 100 yard dash is 9.21 seconds.

Andrews [41]

Speed is equivalent to the distance traveled divided by the time it takes to travel that certain distance.
To solve this problem convert the units first from meter and yards to miles. 100 metes is 0.0621371mi and 100 yards is 0.0568182 yard. 9.69s = 0.002691667 hr and 9.21s = 0.002558333

A.) 23mi/hr
B.) 22.20mi/hr

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3 years ago

Read 2 more answers

A scientist introduces an unknown type of particle into a cathode ray tube. The unknown particles travel in the same direction a

sergij07 [2.7K]

Answer: B

Explanation:

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3 years ago

Modern atomic theory states that the atom is a diffuse cloud surrounding a small, dense nucleus. Identify which particle is in t

yaroslaw [1]

B) proton
electrons are in a cloud around it, ions are elements with a charge, idk what a free radical is but ik that protons and neutrons are inside the nucleas

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3 years ago