Question

How many moles of sucroseare in 5.25x1029 sucrosemolecules?[?]x10[?]Enter your answer with the correctnumber of significant figures and be surethe prefix is a number between 1 and 10!Prefix (green)Exponent (yellow)Enter

Answer 1

To calculate the number of moles we will use Avogadro's number, which relates the number of molecules contained in a mole of any substance, the relationship between moles and molecules is as follows:

$\begin{gathered} \text{Moles of a subtances=Molecules}\times\frac{1mol}{6.02\times10^{23}molecules} \\ \text{Moles of sucrose=}5.25\times10^{29}molecules\times\frac{1mol}{6.02\times10^{23}molecules} \\ \text{Moles of sucrose=}8.72\times10^5mol \end{gathered}$

In the statement we are given the molecules with 3 significant figures, therefore the answer must also have 3 significant figures. So the answer will be: In 5.25x10^29molecules are 8.72x10^5 mol of sucrose