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Arlecino [84]
3 years ago
14

Of the options below, which is generally associated with the lowest boiling temperatures when it is the only type of bond presen

t in a material? a. metallic b. covalent c. London dispersion forces d. ionic
Chemistry
1 answer:
Olin [163]3 years ago
5 0

Answer:

Explanation:

Of all the given forces , london dispersion force is the weakest inter-molecular force which is temporary in nature . This force results due to two adjecent atoms  or molecules becoming dipoles temporarily. This force exists among the atoms of inert gases.

Atoms having this force have lowest boiling point.

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A container contains a mixture of hydrogen, oxygen and nitrogen gases. The pressure of hydrogen is 78 kPa. The pressure of oxyge
Nuetrik [128]

<u>Answer:</u> The total pressure of the container is 140.2416 kPa

<u>Explanation:</u>

Dalton's law of partial pressure states that the total pressure of the system is equal to the sum of partial pressure of each component present in it.

To calculate the total pressure, we use the law given by Dalton, which is:

P_T=p_{H_2}+p_{O_2}+p_{N_2}

We are given:

Vapor pressure of hydrogen gas, p_{H_2} = 78 kPa

Vapor pressure of oxygen gas, p_{O_2} = 2.4416 kPa

Vapor pressure of nitrogen gas, p_{N_2} = 59.8 kPa

Putting values in above equation, we get:

P_T=78+2.4416+59.8\\\\P_T=140.2416kPa

Hence, the total pressure of the container is 140.2416 kPa

7 0
3 years ago
Which statement explains how this type of fossil differs from a trace fossil?
KatRina [158]

The answer is:

This fossil was an organism that has been turned into rock.

glad to help!

7 0
4 years ago
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Nitrogen is to the immediate left of oxygen in the same row in the periodic table. Which of the following statements compares th
AURORKA [14]
Nitrogen is radioactive in ur big mouth
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4 0
3 years ago
Answer to 51 please
Marat540 [252]

Answer:I think it is 263

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5 0
4 years ago
Sarah measures out 151 grams of SO2. How many moles is this? Express your answer to three significant figures.
Anna11 [10]

Answer:

\boxed {\boxed {\sf 2.36 \ mol \ SO_2}}

Explanation:

We are asked to convert grams to moles. We will use the molar mass and dimensional analysis to perform this conversion.

<h3>1. Molar Mass</h3>

The molar mass is the mass of 1 mole of a substance. These values are found on the Periodic Table because they are equivalent to the atomic masses, but the units are grams per mole instead.

We are given a mass of sulfur dioxide (SO₂). Look up the molar masses of the individual elements.

  • Sulfur (S): 32.07 g/mol
  • Oxygen (O): 15.999 g/mol

Notice that the formula of the compound contains a subscript. The subscript after O means there are 2 moles of oxygen in 1 mole of sulfur dioxide. We must multiply oxygen's molar mass before adding sulfur's.

  • O₂: 15.999 * 2 = 31.998 g/mol
  • SO₂= 32.07 + 31.998 = 64.068 g/mol

<h3>2. Convert Grams to Moles </h3>

Now we will use dimensional analysis to convert grams to moles. From the molar mass, we know there are 64.068 grams of sulfur dioxide per mole, so we can set up a ratio.

\frac {64.068 \ g \ SO_2} {1 \ mol \ SO_2}

We are converting 151 grams to moles, so we multiply by this value.

151 \ g \ SO_2 *\frac {64.068 \ g \ SO_2} {1 \ mol \ SO_2}

Flip the ratio so the units of grams of sulfur dioxide cancel.

151 \ g \ SO_2 *\frac {1 \ mol \ SO_2}{64.068 \ g \ SO_2}

151  *\frac {1 \ mol \ SO_2}{64.068 }

\frac {151}{64.068 } \ mol \ SO_2

2.356870825 \ mol \ SO_2

<h3>3. Round </h3>

The original measurement of grams (151) has 3 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place. The 6 in the thousandth place tells us to round the 5 in the hundredth up to a 6.

2.36 \ mol \ SO_2

151 grams of sulfur dioxide is approximately <u>2.36 moles of sulfur dioxide.</u>

8 0
3 years ago
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