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aleksandr82 [10.1K]
3 years ago
9

In the formula KBr, there is/are:

Chemistry
1 answer:
Damm [24]3 years ago
5 0
<h3>Answer:</h3>

b. 1 Potassium  atom

c. 1 bromine atom

<h3>Explanation:</h3>

What is a compound?

  • A compound is a substance that is made up of atoms from different elements.
  • The formula of a compound shows the elements making up the compound.
  • Additionally, the formula of compound shows the number atoms of each element making up the compound.

In this case;

We are given the Formula KBr

  • This is the formula of the compound potassium bromide.
  • From the formula, we can tell that the compound is made up of potassium and bromine atoms.
  • The formula also shows the number of atoms of each element, that is, 1 potassium atom and 1 bromide atom.
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3 years ago
When a piece of metal is irradiated with UV radiation (λ = 162 nm), electrons are ejected with a kinetic energy of 3.54×10-19 J.
dsp73

We have that the work function of the metal

\phi=1.227*10^{-18}J

From the Question we are told that

UV radiation (λ = 162 nm)

Kinetic energy K.E =3.54*10-19 J.

Generally the equation for Kinetic energy    is mathematically given as

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\phi=1.227*10^{-18}J

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2 years ago
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This tells us that

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So we can also state from the above equation, that when we have more mass, we need more net force to accelerate it. Here, we are keeping the acceleration constant so we can surely say that force and mass varies directly.

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Hopefully this helps :)
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