Question

In the chemical reaction: 3Ca + 2FeCl3 -> 3CaCl2 + 2Fe, identify the individual elements and the number of atoms involved in the reactants.

A) Calcium (Ca) - 3 atoms, Iron (Fe) - 2 atoms
B) Calcium (Ca) - 2 atoms, Iron (Fe) - 3 atoms
C) Calcium (Ca) - 6 atoms, Iron (Fe) - 4 atoms
D) Calcium (Ca) - 4 atoms, Iron (Fe) - 6 atoms

Answer 1

In the reaction 3Ca + 2FeCl₃, there are 3 atoms of calcium and 2 atoms of iron in the reactants, making the correct answer A) Calcium (Ca) - 3 atoms, Iron (Fe) - 2 atoms.

Step-by-step explanation:

In the chemical reaction 3Ca + 2FeCl₃ -> 3CaCl₂ + 2Fe, we are analyzing the reactants to determine the individual elements and the number of atoms involved. For calcium (Ca), there are 3 atoms of Ca shown before the plus sign, and since there is a coefficient of 3 for Ca, this means there are a total of 3 x 1 = 3 atoms of calcium. For iron (Fe), there is a coefficient of 2 in front of FeCl₃, indicating 2 formulas of iron(III) chloride, each containing one iron atom, so there are 2 x 1 = 2 atoms of iron. Therefore, the correct answer is A) Calcium (Ca) - 3 atoms, Iron (Fe) - 2 atoms.