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natita [175]
2 years ago
14

Find the partial pressure of helium gas in mmHg

Chemistry
1 answer:
mezya [45]2 years ago
5 0

Answer:

214 mmhg

Explanation:

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How long does it take for a 12.62g sample of ammonia to heat from 209K to 367K if heated at a constant rate of 6.0kj/min? The me
Georgia [21]
First, consider the steps to heat the sample from 209 K to 367K.

1) Heating in liquid state from 209 K to 239.82 K

2) Vaporaizing at 239.82 K

3) Heating in gaseous state from 239.82 K to 367 K.


Second, calculate the amount of heat required for each step.

1) Liquid heating

Ammonia = NH3 => molar mass = 14.0 g/mol + 3*1g/mol = 17g/mol

=> number of moles = 12.62 g / 17 g/mol = 0.742 mol

Heat1 = #moles * heat capacity * ΔT

Heat1 = 0.742 mol * 80.8 J/mol*K * (239.82K - 209K) = 1,847.77 J

2) Vaporization

Heat2 = # moles * H vap

Heat2 = 0.742 mol * 23.33 kJ/mol = 17.31 kJ = 17310 J

3) Vapor heating

Heat3 = #moles * heat capacity * ΔT

Heat3 = 0.742 mol * 35.06 J / (mol*K) * (367K - 239.82K) = 3,308.53 J

Third, add up the heats for every steps:

Total heat = 1,847.77 J + 17,310 J + 3,308.53 J = 22,466.3 J

Fourth, divide the total heat by the heat rate:

Time = 22,466.3 J / (6000.0 J/min) = 3.7 min

Answer: 3.7 min


3 0
3 years ago
Mineral oil dissolves in hexane but not in ethanol
chubhunter [2.5K]
That would be correct as stated.
6 0
3 years ago
Read 2 more answers
From the choices provided below, list the reagent(s) in order that will react with 3-pentanone to form 3-pentanol
Soloha48 [4]

3-pentanone to form 3-pentanol

Here 3-pentanone reacts with H2/Pt  to given 3-pentanol

So here with one step we can convert given ketone to alcohol

The reaction will be


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3 years ago
What is cirrhosis?describe symptoms and types of hepatitis​
DiKsa [7]
Cirrhosis is liver damage that can lead to scarring and even liver failure.
Hepatitis b and c are caused by a virus, and alcoholic hepatitis is caused by drinking too much alcohol.
8 0
3 years ago
Please am confused and need help​
alex41 [277]

Answer:

1.  C

2.  C

3.  A

4.  C

5.  True

6.  C

Explanation:

1. C  The answer is conduction because the heat was transferred through direct contact.

2. C  The answer convection because the heat was transferred through a medium (liquid/gas).

3. A  The answer is conduction because the heat was transferred through direct contact.

4. C  The answer is radiation because the heat was transferred through thermal emission.

5. True.  This is because the air that is warmed rises, causing the cool air to replace it.  You can picture it like the scenario in question 2.

6. C  

3 0
3 years ago
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