6 moles of neon
3 moles of oxygen
2 moles of chlorine
1 mole of ethane
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At standard temperature and pressure (s.t.p), one mole of any gas contains the same number of molecules, known as Avogadro’s number (6.022×1023). Therefore, the number of atoms can be calculated by multiplying the number of moles by Avogadro’s number. However, we need to consider that some gases are diatomic, meaning they exist as two atoms bonded together (like oxygen and chlorine), and some gases are monoatomic like neon. Ethane (C2H6) has a total of 8 atoms per molecule.
Let’s calculate:
A. 6 moles of neon (Ne) = 6×6.022×1023 = 3.6132×1024 atoms
B. 3 moles of oxygen (O2) = 3×2×6.022×1023 = 3.6132×1024 atoms
C. 2 moles of chlorine (Cl2) = 2×2×6.022×1023 = 2.4088×1024 atoms
D. 1 mole of ethane (C2H6) = 1×8×6.022×1023 = 4.8176×1024 atoms
So, the correct answer is D. 1 mole of ethane as it contains the highest number of atoms at s.t.p
To determine which option contains the highest number of atoms, let's calculate the total number of atoms for each option:
A. 6 moles of neon (Ne): 6 moles * 1 atom/molecule * 6.022 x 10^23 molecules/mole = 3.6132 x 10^24 atoms
B. 3 moles of oxygen (O2): 3 moles * 2 atoms/molecule * 6.022 x 10^23 molecules/mole = 3.6132 x 10^24 atoms
C. 2 moles of chlorine (Cl2): 2 moles * 2 atoms/molecule * 6.022 x 10^23 molecules/mole = 2.4088 x 10^24 atoms
D. 1 mole of ethane (C2H6): 1 mole * 8 atoms/molecule * 6.022 x 10^23 molecules/mole = 4.8176 x 10^24 atoms
Based on the calculations, the correct answer is D. 1 mole of ethane.
Hello!!
The answer is correct because the gas that contains the highest number of atoms at standard temperature and pressure (s.t.p) is the gas with the highest number of moles.
6 moles of Ne would contain 6 times Avogadro's number (6.02 x 10^23) of atoms making it the gas with the highest number of atoms.
3 moles of oxygen would contain 3 times Avogadro's number (6.02 x 10^23) of atoms which is less than less than the number of atoms of Ne
2 moles of chlorine would contain 2 times Avogadro's number (6.02 x 10^23) of atoms.
Lastly 1 mole of Ethane C2H6 would contain 1 times Avogadro's number (6.02 x 10^23) of atoms. So 1 mole of ethane would have the fewest number of atoms than any of the above options.
Therefore, the gas that contains the highest number of atoms at s.t.p is 6 moles of neon.
Dear All,
Kindly note that the necessary correction has been made. Thanks for your contributions.
