Question

question 1
how many glucose molecules (c6h12o6) are in 9.00 g of glucose? its molar mass is 180.18 g/mol. use the conversion factor discussed in the lecture and show your work.

Explanation:

Step1: Calculate the number of moles

Use the formula $n=\frac{m}{M}$, where $m$ is the mass and $M$ is the molar - mass. Given $m = 9.00\ g$ and $M=180.18\ g/mol$.
$n=\frac{9.00\ g}{180.18\ g/mol}\approx0.05\ mol$

Step2: Calculate the number of molecules

Use Avogadro's number $N_A = 6.022\times10^{23}\ molecules/mol$. The number of molecules $N=n\times N_A$.
$N = 0.05\ mol\times6.022\times10^{23}\ molecules/mol=3.011\times10^{22}\ molecules$

Answer:

$3.011\times 10^{22}$ glucose molecules