Question

how many silicon atoms are there in 3 molecules of sih₄? hint: the symbol for silicon is si.

Explanation:

Step1: Analyze the formula of SiH₄

In one molecule of $\ce{SiH_4}$, there is 1 silicon (Si) atom (since the formula shows 1 Si and 4 H atoms).

Step2: Calculate the number of Si atoms in 3 molecules

If 1 molecule of $\ce{SiH_4}$ has 1 Si atom, then for 3 molecules, we multiply the number of molecules by the number of Si atoms per molecule. So, $3\times1 = 3$.

Answer:

3