Question

Which has the most number of moles?

a. 03.01x10^21 magnesium sulfide molecules
b. 6.02x10^25 sodium oxide molecules
c. 6.02x10^23 ozone molecules
d. 6.02x10^23 lithium atoms

Answer 1

The sample with 6.02×10^25 sodium oxide molecules has the most number of moles, amounting to 100,000 moles, which is much larger than one mole represented by Avogadro's number, 6.02×10^23.

Step-by-step explanation:

The question is asking which of the given samples has the greatest number of moles. To answer this, we need to recognize that one mole of any substance contains Avogadro's number of particles, which is 6.02 × 10^23. Now, let's compare the provided samples with this information:

• 3.01×10^21 magnesium sulfide molecules: This number is much less than Avogadro's number, so it is less than one mole.
• 6.02×10^25 sodium oxide molecules: This number is greater than Avogadro's number. In fact, it is 100,000 moles, because 6.02×10^25 divided by 6.02×10^23 equals 100,000.
• 6.02×10^23 ozone molecules: This is exactly one mole, as it equals Avogadro's number.
• 6.02×10^23 lithium atoms: Similar to the ozone molecules, this is also one mole.

Therefore, the sample that has the most number of moles is the 6.02×10^25 sodium oxide molecules.