At STP, which gas sample has a volume of 11.2 liters?
A
0.250 mole of NH3

B
0.500 mole of CO2

C
0.750 mole of NH3

D
1.00 mole of CO2

From the given gases, 0.5 moles of Carbon dioxide has a volume of 11.2 L. Thus, option B is correct.

The volume of gas at STP can be calculated with the help of the ideal gas equation. According to the equation:

PV = nRT

where, P= pressure = 1 atm.

V = volume (L)

n = moles of the gas

R = constant = 0.0816 L atm/mol K

T = temperature = 273 K

The volume of the given gases will be:

A. 0.25 mole of

V = 0.25 0.0816 273 L

V = 5.56 L

B. 0.50 mole of

V = 0.50 0.0816 273 L

V = 11.13 L

C. 0.75 mole of

V = 0.75 0.0816 273 L

V = 16.70 L

D. 1 mole of

V = 1 0.0816 273 L

V = 22.27 L

Thus, from the given gases, 0.5 moles of Carbon dioxide has volume of 11.2 L. Thus, option B is correct.

For more information about volume at STP, refer to the link:

link

0.500 moles of CO2 has a volume of 11.2 L at STP (option B)

Explanation:

Step 1: Data given

Volume of a gas at STP = 11.2 L

STP: Pressure = 1 atm  and temperature = 273 K

Step 2: Calculate volume

p*V= n*R*T

V = (n*R*T)/p

⇒with V = the volume of the gas = TO BE DETERMINED

⇒with n = the number of moles of the gas

⇒with R = the gas constant = 0.08206 L*atm/mol*K

⇒with T = the temperature = 273 K

⇒with p = the pressure of the gas = 1 atm

A ) 0.250 mole of NH3

V = (0.250 * 0.08206 * 273) / 1

V = 5.6 L

B ) 0.500 mole of CO2

V = (0.500 * 0.08206 * 273) / 1

V = 11.2 L

C ) 0.750 mole of NH3

V = (0.750 * 0.08206 * 273) / 1

V = 16.8 L

D) 1.00 mole of CO2

V = (1.00 * 0.08206* 273) / 1

V = 22.4 L

0.500 moles of CO2 has a volume of 11.2 L at STP (option B)

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.