Question

silicon (si) is the primary component in solar panels, which convert sunlight into electricity. how many moles of silicon atoms are in a solar panel that contains 662.7 grams of silicon? refer to a periodic table. write your answer to the correct number of significant figures. round if necessary. moles

Explanation:

Step1: Find molar - mass of silicon

From the periodic table, the molar mass of silicon (Si) is approximately 28.09 g/mol.

Step2: Calculate the number of moles

Use the formula $n=\frac{m}{M}$, where $n$ is the number of moles, $m$ is the mass in grams, and $M$ is the molar mass in g/mol. Given $m = 662.7$ g and $M=28.09$ g/mol, then $n=\frac{662.7}{28.09}$.
$n = 23.6$ mol (rounded to three significant figures)

Answer:

23.6