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dmitriy555 [2]
3 years ago
8

The photograph shows the most abundant substance on Earth's su Which fact about this substance tells you that it is a compound?

A. It is a colorless liquid that is inflammable. B. It is made up of atoms that have mass and take up space c. It can be separated into two substances by a chemical pro D. It appears to be the same type of matter throughout.​
Chemistry
2 answers:
Arlecino [84]3 years ago
5 0

Answer:

B. It is made up of atoms that have mass and take up space

rosijanka [135]3 years ago
4 0

Answer:

the answer to this question is b

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What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.3×1015Hz?
Sonja [21]

Answer:

We know that

ħf = ф + Ekmax  

where  

ħ = planks constant = 6.626x10^-34 J s  

f = frequency of incident light = 1.3x10^15 /s (1 Hz =

1/s)

ф = work function of the cesium = 2.14 eV  

Ekmax = max  kinetic energy of the emmitted electron.  

We distinguish that:

1 eV = 1.602x10^-19 J

So:

2.14 eV x (1.602x10^-19 J / 1 eV) = 3.428x10^-19 J

So,

Ekmax = (6.626x10^-34 J s) x (1.3x10^15 / s) - 3.428x10^-19 J

= 8.6138x10^-19 J - 3.428x10^-19 J = 5.1858x10^-19 J  

Answer:

5.19x10^-19 J  

Kinetic energy:

In physics, the kinetic energy of an object is the energy that it owns due to its motion. It is defined as the work required accelerating a body of a given mass from rest to its specified velocity. Having expanded this energy during its acceleration, the body upholds this kinetic energy lest its speed changes.

Answer details:

Subject: Chemistry

Level: College

Keywords:

• Energy  

• Kinetic energy

• Kinetic energy of emitted electrons

Learn more to evaluate:

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Answer:

As you move from left to right, the nucleus gains protons. This increases the positive charge of the nucleus and its attractive force on the electrons. At the same time, electrons are added to the atoms as you move from left to right across a period.

Explanation:

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Answer: If you think about it, B. would be the most reasonable answer with the given factors.

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Answer:

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Explanation:

if i am wrong sorry have a good day

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3 years ago
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