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3 years ago

Carbon dioxide and helium which has a higher van der waals force of attraction between molecules

Chemistry

1 answer:

raketka [301]3 years ago

7 0

Answer:

Carbon dioxide

Explanation:

Neither helium nor carbon dioxide has a molecular dipole, so their strongest van der Waals attractive forces are London forces.

Helium is a small spherical atom with only a two electrons, so its atoms have quite weak attractions to each other.

CO₂ is a large linear molecule. It has more electrons than helium, so the attractive forces are greater. Furthermore, the molecules can align themselves compactly side-by-side and maximize the attractions (see below).

For example. CO₂ becomes a solid at -78 °C, but helium must be cooled to -272 °C to make it freeze (that's just 1 °C above absolute zero).

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"The truth of this world" *sigh* What could it be?

dlinn [17]

Answer: "The Truth of This world" in this relation can be any different of anything negative or positive especially with lack of good environment creates tension and stress on the human body both mentally and physically and can cause anger, frustration, hurt, or loneiless.

Explanation:

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2 years ago

What is the empirical formula for a substance if a 201.6 g sample of it contains 54.0 grams of nitrogen, 15.0 grams of hydrogen,

jeyben [28]

The empirical formula of the substance would be $NH_4Cl$

<h3>Empirical formula calculation</h3>

The constituents of the compound are as follows:

N = 54/201.6 = 26.78% = 26.78/14 = 1.91 moles

H = 15/201.6 = 7.44% = 7.44/1 = 7.44 moles

Cl = 132.6/201.6 = 65.48% = 65.48/35.5 = 1.84 moles

Divide the number of moles by the smallest"

N = 1.91/1.84 = 1

H = 7.44/1.84 = 4

Cl = 1.84/1.84 = 1

Thus, the empirical formula is $NH_4Cl$

More on empirical formula can be found here: brainly.com/question/14044066

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6 0

2 years ago

How do I do this if carbon has 4 valence electrons and oxygen has six valance electrons how do I do that if they only need eight

Sveta_85 [38]

The carbon will make two double bonds with the oxygen: O=C=O this way carbon will make 4 covalent bonds and oxygen will make 2 covalent bonds

4 0

3 years ago

A sample of ammonium nitrate, weighing 25.2 g, was added to a 150.0 mL container of H2O at 20.0 °C, and then is thoroughly disso

OLga [1]

Explanation:

It is known that the relation between heat energy, specific heat and change in temperature is as follows.

q = $m \times C \times \Delta T$

where, q = heat released or absorbed

m = mass of substance

C = specific heat

$\Delta T$ = change in temperature

It is given that mass is 25.2 g and it is added to 150 ml container so total mass will be (25.2 g + 150 g) = 175.2 g, $T_{1}$ is $20^{o}C$ , $T_{2}$ is $8.5^{o}C$ , and specific heat of water is 4.184 $J/g ^{o}C$ .