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Fynjy0 [20]
3 years ago
12

Jeremy left his bike outside overnight. When he woke up in the morning, there were water drops on the seat. When he went to ride

his bike after lunch, he saw the water drops had disappeared. Which statement best describes what happened to the water? (2 points) a The energy from the sun caused the water drops to condense. b The energy from the sun caused the water on the seat to boil. c The energy from the sun cooled the water, causing it to evaporate. d The energy from the sun heated the water, causing it to evaporate.
Chemistry
1 answer:
Alex777 [14]3 years ago
5 0

Answer:

d The energy from the sun heated the water, causing it to evaporate.

Explanation:

The correct description of what happened is that the energy from the sun heated the water and causes it to evaporate completely.

Evaporation is a phase change process in which liquid is converted to gases. This occurs when a liquid gains considerable amount of energy. The molecules then breaks free from the bond holding compound place.

  • Option A is wrong because the energy from the sun does not cause condensation i.e. change from gas to liquid.
  • The water on the seat does not boil, it simply evaporates. So, option B is wrong.
  • When heat energy is added, it does not cause cooling of water. So option C is wrong.
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Compound X has a molar mass of 416.48 g mol
bazaltina [42]

Answer:

P₂Cl₁₀

Explanation:

From the question given above, the following data were obtained:

Molar mass of compound X = 416.48 g/mol

Percentage of phosphorus (P) = 14.87%

Percentage of Chlorine (Cl) = 85.13%

Molecular formula of X =?

Next, we shall determine the empirical formula of compound X. This can be obtained as follow:

P = 14.87%

Cl = 85.13%

Divide by their molar mass

P = 14.87 / 31 = 0.480

Cl = 85.13 / 35.5 = 2.398

Divide by the smallest

P = 0.480 / 0.480 = 1

Cl = 2.398 / 0.480 = 5

Empirical formula of compound X is PCl₅

Finally, we shall determine the molecular formula of compound X. This can be obtained as follow:

Molar mass of compound X = 416.48 g/mol

Empirical formula = PCl₅

Molecular formula =?

Molecular formula= [Empirical formula]ₙ

[PCl₅]ₙ = 416.48

[31 + (35.5 × 5)]ₙ = 416.48

[31 + 177.5]n = 416.48

208.5n = 416.48

Divide both side by 208.5

n = 416.48 / 208.5

n = 2

Molecular formula = [PCl₅]ₙ

Molecular formula = [PCl₅]₂

Molecular formula = P₂Cl₁₀

Therefore, the molecular formula of compound X is P₂Cl₁₀

4 0
3 years ago
Porque as vezes nos da borboletas no estomago?
nexus9112 [7]

Answer:

No haces literalmente, pero metepóricamente, su forma de hablar, lo que significa que tienes un sentimiento no argumental hacia algunos. La resonancia detrás de esto es que algunas personas pueden encontrar atractiva a una persona concreta o tener una buena personalidad, así que comienzas a asimilar esos sentimientos.

Explanation:

8 0
3 years ago
A reaction mechanism has the following elementary step as the slow step: B2A What is the rate law for this elementary step? O ra
xenn [34]

Answer:

r = k [ B ]

Explanation:

  • B → 2A

⇒ r = k [ A ]/2 = k [ B ]

3 0
3 years ago
The concentration of an additive in a standard sample of palm oil was measured 6 times and the following results were obtained:
Lerok [7]

In the data, 0.20 ppm is an outlier and this can be rejected if there is a 95% confidence level.

<h3>What is an outlier?</h3>

When analyzing data an outlier is a value that is abnormal or too different from other data. In the case presented 0.20 can be tagged as an outlier because other values such as 0.11, 0.12, 0.13, and 0.14 are similar while 0.20 is outside this range.

<h3>Should this piece of data be rejected?</h3>

The general rule is that if there is a 95% of confidence or higher you can reject an outlier, knowing the other data occurs 95% of the time, and therefore the outlier is improbable.

Based on this, you can reject an outlier if the confidence level is 95%.

Learn more about outlier in: brainly.com/question/9933184

7 0
2 years ago
What is 3O2 in science
andrew11 [14]

Answer:

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Explanation:

7 0
3 years ago
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