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3 years ago

Which statement applies to electronegativity?

Chemistry

1 answer:

densk [106]3 years ago

7 0

<u>Answer:</u> The correct answer is Option A.

<u>Explanation:</u>

Electronegativity is defined as the tendency of an atom to attract the shared pair of electrons towards itself whenever a bond is formed.

This property increases as we move from left to right across a period because the number of charge on the nucleus gets increased and electrons are attracted more towards the nucleus.

This property decreases as we move from top to bottom in a group because the electrons get add up in the new shells which make them further away from the nucleus.

Thus, the correct answer is Option A.

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An FM station broadcasts music at 93.5 MHz (megahertz, or 10⁶ Hz). Find the wavelength (in m, nm, and Å) of these waves.

Grace [21]

Answer:

The wavelength in m = 3.208 m

The wavelength in nm = $3.208\times 10^9 nm$

The wavelength in Å = $3.208\times 10^{10} \AA$

Explanation:

To calculate the wavelength of light, we use the equation:

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

where,

$\lambda$ = wavelength of the radiation

c = speed of light = $3.0\times 10^8m/s$

$\nu$ = frequency of wave

We have :

Frequency of the wave = $\nu =93.5MHz=93.5\times 10^6 Hz$

$1 Hz = 1s^{-1}$

Wavelength of the wave = $\lambda$

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

$\lambda=\frac{3\times 10^8 m/s}{93.5\times 10^6 s^{-1}}=3.208 m$

$1 m = 10^9 nm$

$3.208 m= 3.208\times 10^9 nm$

$1 m = 10^{10} \AA$

$3.2086 m= 3.208\times 10^{10} \AA$

The wavelength in m = 3.208 m

The wavelength in nm = $3.208\times 10^9 nm$

The wavelength in Å = $3.208\times 10^{10} \AA$

7 0

4 years ago

Which statement is true about the particles of a liquid when the liquid changes into a solid?

Reptile [31]

Answer:

they move closer to each other

7 0

3 years ago

What is the purpose of the scientific method?

Umnica [9.8K]

Answer:

The Scientific Method helps you put together experiments, use data to find conclusions and interpret them.

Explanation:

pls brainliest thank you

7 0

3 years ago

I mix 30 grams of a solid, 30 grams of another solid, and 5 milliliter of water together in a sealed container. A chemical react

jok3333 [9.3K]

The same because it cant losers anything

5 0

3 years ago

Zinc reacts with hydrochloric acid according to the reaction equation Zn ( s ) + 2 HCl ( aq ) ⟶ ZnCl 2 ( aq ) + H 2 ( g ) How ma

REY [17]

Answer:

34.7mL

Explanation:

First we have to convert our grams of Zinc to moles of zinc so we can relate that number to our chemical equation.

So: 6.25g Zn x (1 mol / 65.39 g) = 0.0956 mol Zn

All that was done above was multiplying the grams of zinc by the reciprocal of zincs molar mass so our units would cancel and leave us with moles of zinc.

So now we need to go to HCl!

To do that we multiply by the molar coefficients in the chemical equation:

$\frac{0.0956g Zn}{1 } (\frac{2 mol HCl}{1molZn})$

This leaves us with 2(0.0956) = 0.1912 mol HCl

Now we use the relationship M= moles / volume , to calculate our volume

Rearranging we get that V = moles / M

Now we plug in: V = 0.1912 mol HCl / 5.50 M HCl

V= 0.0347 L

To change this to milliliters we multiply by 1000 so:

34.7 mL

7 0

4 years ago