Ask question

Ask question

All categories

3 years ago

9

The gas described in parts a and b has a mass of 1.66 g. the sample is most likely which monatomic gas?

2 answers:

nordsb [41]3 years ago

7 0

Mass of the gas m = 1.66
The calculated temperature T = 273 + 20 = 293
We have to calculate molar mass to determine the gas
Molar Mass = mRT / PV
M = (1.66 x 8.314 x 293) / (101.3 x 1000 x 0.001)
M = 4043.76 / 101.3 = 39.92 g/mol
So this gas has to be Argon Ar based on the molar mass.

PtichkaEL [24]3 years ago

6 0

Answer is: gas is argon (Ar).
Missing part of question find on internet:
part a: p(gas) = 1 atm, T(gas) = 20°C = 293,15 K.
part b: V(gas) = 1 L.
Ideal gas law: p·V = n·R·T or p·V = m/M·R·T.
R(universal gas constant) = 0,08206 L·atm<span>/mol·K.
</span>M = m·R·T÷p·V
M = 1,66 g·0,08206 L·atm<span>/mol·K</span>·293,15K÷(1 atm·1 L)
M = 39,9 g/mol (argon).

You might be interested in

Am I weird or is no one seeing my qn<br>free point by the way

Julli [10]

Answer:

maybe they don't want to answer it only if you give them a lot of points and brainliest they will answer it i think

Explanation:

5 0

2 years ago

Read 2 more answers

olga2289 [7]

What does matter mean?

Object which has mass and occupies space

What does atom mean?

The smallest particle of a chemical element which is made mainly by 3 sub-atomic particles called Protons,Electrons and Neutrons.

What does molecule mean?

A small group of atoms bonded together.

8 0

3 years ago

Read 2 more answers

Write iupac name of :

Orlov [11]

A)Nitrogen (IV) oxide

B)propane

4 0

2 years ago

Explain some of the benefits and problem associated with the pesticide DDT.

Dafna1 [17]

Some benefits are that DDT helps us grow crops and keeps pests off our crops.

But DDT is harmful to the environment. If it gets into the water ways then if can harm fish and animals that eat the fish such as birds.

4 0

2 years ago

A gas mixture with a total pressure of 745 mmHg contains each of the following gases at the indicated partial pressures: CO2, 24

Setler79 [48]

<u>Answer:</u>

<u>For Part A:</u> The partial pressure of Helium is 218 mmHg.

<u>For Part B:</u> The mass of helium gas is 0.504 g.

<u>Explanation:</u>

<u>For Part A:</u>

We are given:

$p_{CO_2}=245mmHg\\p_Ar}=119mmHg\\p_{O_2}=163mmHg\\P=745mmHg$

To calculate the partial pressure of helium, we use the formula:

$P=p_{CO_2}+p_{Ar}+p_{O_2}+p_{He}$

Putting values in above equation, we get:

$745=245+119+163+p_{He}\\p_{He}=218mmHg$

Hence, the partial pressure of Helium is 218 mmHg.

<u>For Part B:</u>

To calculate the mass of helium gas, we use the equation given by ideal gas:

PV = nRT

or,

$PV=\frac{m}{M}RT$

where,

P = Pressure of helium gas = 218 mmHg

V = Volume of the helium gas = 10.2 L

m = Mass of helium gas = ? g

M = Molar mass of helium gas = 4 g/mol

R = Gas constant = $62.3637\text{ L.mmHg }mol^{-1}K^{-1}$

T = Temperature of helium gas = 283 K

Putting values in above equation, we get:

$218mmHg\times 10.2L=\frac{m}{4g/mol}\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 283K\\\\m=0.504g$

Hence, the mass of helium gas is 0.504 g.

6 0

3 years ago