Question

Given 2.91 moles of a gas at 12 degrees Celsius and at 104.25 kilopascals, what is the volume of the gas? (The ideal gas constant is 0.0821 L · atm/mol · K; 101.325 Kpa = 1 atm)


6.60 x 101 L

6.53 x 10-1 L

2.79 x 100 L

2.75 x 10-2 L

Answer 1

Use algebra to rearrange the formula \(PV = nRT\) to solve for \(V\)
That means you'll be dividing.
Also, temperature must be converted to Kelvins, and pressure in units of atm.

Answer 2

so the last one>

Answer 3

?

Answer 4

I didn't work it out, but all you're doing is dividing by pressure to solve for \(V\). If that is what you fot in your calculator, then it should be the right answer, given that you did the right conversions for both temperature and pressure.

Answer 5

A titration curve plots:


acid concentration versus base concentration

volume or moles of titrant versus pH

pH versus volume or moles of titrant

base concentration versus acid concentration
what would this be?

Answer 6

What do you think it is? :)

Answer 7

third one!

Answer 8

Correct.

Answer 9

Given 2.4 liters of a gas at 25 degrees Celsius and at 782 torr, how many moles of gas are present? (The ideal gas constant is 0.0821 L · atm/mol · K and 1 atm = 760 torr.)


1.01 x 10-1 moles

9.14 x 102 moles

7.70 x 101 moles

1.20 x 100 moles

can you solve this one? i think it is the first one.. thanks

Answer 10

Same as the first problem, use the ideal gas law formula: \(PV = nRT\) except this time you are solving for "n"

HINT: Convert temperature 25 C \(\rightarrow\) K and 782 torr \(\rightarrow\) K
To convert to K, add 273.15 to 25 degree celcius.
And you already have the relationship given there 1 atm = 760 torr.

Answer 11

For which of the following is heat energy absorbed?


Deposition

Melting

Condensation

Freezing

Last one!

Answer 12

Which do you think it is? Depisition or Condensation.

Answer 13

depsition

Answer 14

Oh soryr I meant, deposition or condensation are NOT corret.

Answer 15

melting?

Answer 16

no condensation

Answer 17

No. Melting.
If you take an ice-cube and it becomes cold, you will eventually get water. If you heat it enough, the water becomes warm, hot, and eventually becomes a gas.
Since the water becomes warm/hot, it must mean that water absorbed the heat. Right?

Answer 18

For which of the following is heat energy absorbed?


Deposition

Condensation

Sublimation

Freezing