Question

determine the number of particles in the 2.20 mol sample of sio2. 1 mol sio2 = 6.02 x 10^23 particles sio2 2.20 mol sio2 = ? x 10^? particles sio2 enter the coefficient in the green box and the exponent in the yellow box. round your coefficient to two decimal places.

Explanation:

Step1: Use Avogadro's number relationship

We know that 1 mol of any substance contains $6.02\times 10^{23}$ particles. To find the number of particles in 2.20 mol of $SiO_2$, we multiply the number of moles by Avogadro's number.
Let $n$ be the number of moles ($n = 2.20$) and $N_A=6.02\times 10^{23}$ particles/mol. The number of particles $N=n\times N_A$.
$N = 2.20\times6.02\times 10^{23}$

Step2: Perform the multiplication

$2.20\times6.02 = 13.244$.
So $N=13.244\times 10^{23}$.
In scientific - notation, we rewrite it as $N = 1.3244\times 10^{24}$. Rounding the coefficient to two decimal places, we get $N = 1.32\times 10^{24}$.

Answer:

Coefficient: 1.32
Exponent: 24