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Chemistry

1 answer:

Vladimir [108]3 years ago

4 0

1. A 2. D 3. C 4. B are the answers

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Describe relationship between frequency, wavelength, and energy as you move up and down the spectrum.

nadya68 [22]

When frequency increases more wave crests pass a fixed point each second. That means the wavelength shortens. So, as frequency increases, wavelength decreases. The opposite is also true.... as frequency decreases, wavelength increases.

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3 years ago

Which type of bond is present in hydrogen sulfide (H2S)? The table of electronegativities is given

LuckyWell [14K]

Bonds formed between atoms can be classified as ionic and covalent

Ionic bonds are formed between atoms that have a high difference in the electronegativity values.

In contrast, bonds formed between atoms that have a difference in electronegativity lower than the ionic counterparts are polar covalent bonds. If the atoms have very similar electronegativities, they form non-polar covalent bonds.

In H2S, the S atom is bonded to 2 H atoms. The electronegativity of H = 2.2 and S= 2.56. Since the difference is not high the bond formed will be covalent (polar covalent).

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4 years ago

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High levels of cholesterol can first lead directly to __________.

Marta_Voda [28]

B) arteriosclerosis

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3 years ago

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How many valence electrons are in each atom?

Zarrin [17]

Group 1 atoms only have one. Group 2 has 2 valence electrons, and so on.

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4 years ago

Of the following gases, ________ will have the greatest rate of effusion at a given temperature. Of the following gases, _______

kolezko [41]

<u>Answer:</u> From the given gases, the greatest rate of effusion is of $CH_4$

<u>Explanation:</u>

Rate of effusion of a gas is determined by a law known as Graham's Law.

This law states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows:

$\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}$