1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AleksandrR [38]
3 years ago
12

a sample of gas with a volume of 2.0 L at STP is found to have a mass of 1.43 g calculate the molecular mass of this gas. is it

possible this gas is methane? why or why not
Chemistry
1 answer:
hoa [83]3 years ago
4 0

Answer:

molar mass = 16.03 g/mol.

Yes, the mentioned gas is methane.

Explanation:

  • We can use the general law of ideal gas: <em>PV = nRT</em>.

where, P is the pressure of the gas in atm (P = 1.0 atm, at STP).

V is the volume of the gas in L (V = 2.0 L).

n is the no. of moles of the gas in mol (n = ??? mol).

R  is the general gas constant (R = 0.0821 L.atm/mol.K),

T is the temperature of the gas in K (T = 273 K, at STP).

∴ n = PV/RT = (1.0 atm)(2.0 L)/(0.0821 L.atm/mol.K)(273 K) = 0.08923 mol.

∵ n = mass/molar mass

<em>∴ molar mass = mass/n</em> = (1.43 g)/(0.08923 mol) = <em>16.03 g/mol.</em>

∵ molar mass of methane (CH₄) = 16.0 g/mol.

<em>So, the mentioned gas is methane.</em>

You might be interested in
What volume of oxygen at STP is requieres for the complete combustion of 100.50 mL of C2H2
malfutka [58]

The volume of oxygen at STP required would be 252.0 mL.

<h3>Stoichiometic problem</h3>

The equation for the complete combustion of C2H2 is as below:

2C_2H_2 + 5O_2 --- > 4CO_2 + 2H_2O

The mole ratio of C2H2 to O2 is 2:5.

1 mole of a gas at STP is 22.4 L.

At STP, 100.50 mL of C2H2 will be:

                 100.50 x 1/22400 = 0.0045 mole

Equivalent mole of O2 according to the balanced equation = 5/2 x 0.0045 = 0.01125 moles

0.01125 moles of O2 at STP = 0.01125 x 22400 = 252.0 mL

Thus, 252.0 mL of O2 gas will be required at STP.

More on stoichiometric problems can be found here: brainly.com/question/14465605

#SPJ1

7 0
1 year ago
I need help trying to find the answer. can u help me?​
Sliva [168]

The answer is:

B. orbits closer to its parent planet that the most other moons

That is because in Neap Tides, Spring Tide, Lunar Eclipse, Solar Eclipse, and other thing you always see the Moon orbiting the Earth in diagrams.  

8 0
2 years ago
Please help i need this as soon as possible
UNO [17]

Answer:

1. 1, 3, 2

2. 2, 2, 3

3. 2, 1, 2, 1

4. 2, 1, 2

5 0
2 years ago
Question 1 of 10
Zepler [3.9K]
A. The pH indicates how acidic or basic a
solution is.
8 0
2 years ago
Read 2 more answers
How many molecules are in 4HCl
Mnenie [13.5K]
4 molecules bc the coefficient is 4
8 0
3 years ago
Other questions:
  • How many moles of HCl are found in 500mL of HCl solution with pH of 3​
    14·1 answer
  • PLEASE!!! I NEED HELP ASAP!!
    11·2 answers
  • What is NaOH in science ​
    6·2 answers
  • How are elements in the same group similar
    6·2 answers
  • AlCl3 is lewis acid. Explain how?
    5·1 answer
  • Explain the relationship between the mole, particles, grams, and Liters.
    15·1 answer
  • A substance that contains various elements or compounds without bonding or fixed proportions is a(n) _____.
    11·2 answers
  • (HELP I HAVE 10 MINS TO TURN IN) why is the nervous system in the human body a system?
    5·1 answer
  • Which organic prefix is matched with the number of carbon atoms that it represents?
    6·1 answer
  • Which subatomic particle accounts for magnetism ?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!