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alexdok [17]
3 years ago
13

A student uses 0.0821 L• atm/mol • K as the value of the gas constant. What is most likely true about the variables in the ideal

gas law?
P has the units of liters • atmospheres, and T has the units of kelvin.

P has the units of liters • atmospheres, and T has the units of degrees Celsius.

V has the units of liters, and T has the units of kelvin.

V has the units of liters, and T has the units of degrees Celsius.
Chemistry
2 answers:
Ray Of Light [21]3 years ago
7 0
Considering P represents pressure why god would it be measured in liters. Ignore the first 2 choices.
With all gas law related questions you never use Celsius temperatures.
The answer has to be V has units of liters, and T has the units of kelvin.
serious [3.7K]3 years ago
4 0

Answer is: V has the units of liters, and T has the units of kelvin.

Ideal gas law: p·V = n·R·T.  

atm · L = mol · L·atm/mol·K · K; both side of equatation have same values.

R = 0,08206 L·atm/mol·K; universal gas constant.  

p is pressure of the gas, unit is standard atmosphere (atm).

V is volume of the gas, unit is liters (L).

n is amount of substance of the gas; unit is mole (mol).

T is temperature of the gas, unit is Kelvin (K).

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45 * 1.20 ÷ 314 = 96 * V2 ÷ 420  

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The new volume is approximately 0.75 liter.

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Answer:

1218.585

Explanation:

Looking at the subscripts we know there are 2 atoms of Fe, 3 atoms of C, and 6 of O.

Take the molar mass of each atom (from the periodic table) and multiply by the # of atoms

Fe: 55.845×2= 111.69

C: 12.011×3= 36.033

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Add the values together: 243.717 g/mol

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7 0
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3 years ago
Determine whether the stopcock should be completely open, partially open, or completely closed for each activity involved with t
densk [106]

Answer:

Close to the calculated endpoint of a titration - <u>Partially open</u>

At the beginning of a titration - <u>Completely open</u>

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Conditioning the buret with the titrant - <u>Completely closed</u>

Explanation:

'Titration' is depicted as the process under which the concentration of some substances in a solution is determined by adding measured amounts of some other substance until a rection is displayed to be complete.

As per the question, the stopcock would remain completely open when the process of titration starts. After the buret is successfully placed, the titrant is carefully put through the buret in the stopcock which is entirely closed. Thereafter, when the titrant and the buret are conditioned, the stopcock must remain closed for correct results. Then, when the process is near the estimated end-point and the solution begins to turn its color, the stopcock would be slightly open before the reading of the endpoint for adding the drops of titrant for final observation.

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