Question

A sample of sugar (C12H22O11) contains 1.505 × 1023 molecules of sugar. How many moles of sugar are present in the sample?

a. 0.25 mol
b. 0.50 mol
c .1.00 mol
d. 2.50 mol

Answer 1

1 mole ------------ 6.02x10²³ molecules
? moles ----------- 1.505x10²³ molecules

(1.505x10²³) x 1 / ( 6.02 x10²³ ) =

(1.505x10²³) / ( 6.02x10²³ ) =

= 0.25 mol

Answer A

hope this helps!

Answer 2

Answer: Option (a) is correct.

Step-by-step explanation:

Molecules of sugar given =
`1.505 * 10^(23)`

According to Avogadro's number it is known that 1 mole contains
`6.023 * 10^(23)`.

Therefore, calculate the moles of sugar present in the sample as follows.

Number of moles =
`\frac {1.505 * 10^(23)}{6.023 * 10^(23)}`

= 0.25 mol

Thus, the moles of sugar present in the sample is 0.25 mol.