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vodka [1.7K]
3 years ago
9

How are stars and comets different?(2 points)

Chemistry
2 answers:
Firlakuza [10]3 years ago
4 0

Answer:

Its D "A star is made up of Ice, rocks, and dust, while a comet is made up of burning gases."

Explanation:

evablogger [386]3 years ago
3 0

Answer:

A star is made up of burning gases, while a comet is made up of ice, gases, rocks, and dust.

Explanation:

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What are the two main classes of simple machines?
Len [333]
The lever family and the inclined plane family.
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1 year ago
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4.A 100 L sample of gas is at a pressure of 80 kPa and a temperature of 200 K. What volume does the same
dexar [7]

Answer:

V₂ = 107.84 L

Explanation:

Given data:

Initial volume = 100 L

Initial pressure = 80 KPa (80/101 =0.79 atm)

Initial temperature = 200 K

Final temperature =273 K

Final volume = ?

Final pressure = 1 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁T₂  /T₁P₂

V₂ = 0.79 atm × 100 L × 273 K / 200 K × 1 atm

V₂ =21567 atm.L.K /200 K.atm

V₂ = 107.84 L

8 0
3 years ago
What is the ratio of hydrogen(H) to oxygen(O) in hydrogen peroxide(H2O2)?
Alona [7]

Answer: 2:2 but if simplified it’s 1:1

Explanation:

7 0
3 years ago
During a reaction, the enthalpy of formation of an intermediate is 34 kJ/mol.
galina1969 [7]

Since the enthalpy can be calculated from the heat of formation, the enthalpy is 136 kJ/mol.

<h3>What is enthalpy?</h3>

The enthalpy of a reaction is the heat that is lost or gained in that reaction. We know that the enthalpy can be calculated from the heat of  formation.

Thus, we can obtain the enthalpy of the reaction as 4 * 34 kJ/mol = 136 kJ/mol.

Learn more about enthalpy:brainly.com/question/13996238

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5 0
2 years ago
The point in a titration when the added amount of standard reagent is equal to the amount of analyte being titrated.
creativ13 [48]
That point is called as EQUILIBRIUM, and then you have to note that value to compare with others
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3 years ago
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