d. 12 atoms of oxygen
Explanation:
Calcium nitrate have the chemical formula Ca(NO₃)₂.
Because we have a coefficient of 2 in front of the chemical formula, we will multiply the number of atoms present in the chemical formula by 2.
number of oxygen atoms in Ca(NO₃)₂ = 2 × 3 = 6 atoms
number of oxygen atoms in 2 Ca(NO₃)₂ = 2 × 2 × 3 = 12 atoms
Learn more about:
number of atoms in a compound
https://brainly.com/question/13897837
#learnwithBrainly
