Question

1. choose the best answer. which element is not in the chemical formula for nitric acid (naoh)? oxygen sodium iron hydrogen 5) choose the best answer. how many oxygen atoms are in sulfuric acid (h₂so₄)? 1 3 4 2

Explanation:

Step1: Identify elements in nitric - acid formula

The chemical formula for nitric acid is $HNO_3$, not $NaOH$ (which is sodium hydroxide). But considering the elements in $NaOH$, they are sodium (Na), oxygen (O), and hydrogen (H). Iron (Fe) is not among them.

Step2: Count oxygen atoms in sulfuric - acid formula

The chemical formula for sulfuric acid is $H_2SO_4$. By looking at the sub - script of oxygen in the formula, the number of oxygen atoms is 4.

Answer:

1. C. iron
2. C. 4