How many nitrogen atoms are present in 0.150 mol of Zn(NO₃)₂?

Question

Quizplus · Accepted Answer

First, we need to determine the number of nitrogen atoms in one mole of Zn(NO₃)₂. To do this, we need to find the coefficient of nitrogen in the chemical formula. Since there is only one nitrogen atom in the compound, the coefficient is 1. Therefore, there are 1 mole of nitrogen atoms in 1 mole of Zn(NO₃)₂. Next, we can use Avogadro's number (6.022 × 10²³) to convert the number of moles to the number of atoms: 0.150 mol Zn(NO₃)₂ x 1 mol N / 1 mol Zn(NO₃)₂ x 6.022 × 10²³ atoms/mol = 9.06 × 10²³ atoms Rounded to two significant figures, this is equivalent to 1.81 × 10²³ atoms. Therefore, the answer is B.

How Many Nitrogen Atoms Are Present in 0