Question

physical science
eams
counting atoms
date
name
count how many atoms for each compound or molecule and then draw each molecule/compound
$nahco_3$
$c_2h_4o_2$

Explanation:

Step1: Count atoms in $\text{NaHCO}_3$

Sodium (Na): 1, Hydrogen (H): 1, Carbon (C): 1, Oxygen (O): 3
Total atoms: $1+1+1+3=6$

Step2: Count atoms in $\text{C}_2\text{H}_4\text{O}_2$

Carbon (C): 2, Hydrogen (H): 4, Oxygen (O): 2
Total atoms: $2+4+2=8$

Answer:

1. For $\text{NaHCO}_3$: 6 total atoms (1 Na, 1 H, 1 C, 3 O)
2. For $\text{C}_2\text{H}_4\text{O}_2$: 8 total atoms (2 C, 4 H, 2 O)

Molecule Drawing Notes:

• $\text{NaHCO}_3$ (sodium bicarbonate): Draw a central carbon atom double-bonded to one oxygen, single-bonded to two other oxygen atoms (one bonded to Na⁺, the other bonded to H).
• $\text{C}_2\text{H}_4\text{O}_2$ (acetic acid): Draw two carbon atoms bonded together; one carbon is double-bonded to an oxygen and single-bonded to an -OH group, the other carbon is bonded to three hydrogen atoms.