Multiple Choice
Which of the following is the correct nuclear equation for the fusion of hydrogen-3 (tritium) with hydrogen-1 (protium) to form helium-4?
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3. Chemical Reactions
Balancing Chemical Equations
Multiple Choice
Which of the following chemical equations is NOT balanced?
A
2 KClO_3 → 2 KCl + 3 O_2
B
2 H_2 + O_2 → 2 H_2O
C
Na + Cl_2 → 2 NaCl
D
C_3H_8 + 5 O_2 → 3 CO_2 + 4 H_2O
Verified step by step guidance1
Step 1: Understand what it means for a chemical equation to be balanced. A balanced equation has the same number of atoms of each element on both the reactant and product sides.
Step 2: Check the first equation: \(2\ KClO_3 \rightarrow 2\ KCl + 3\ O_2\). Count atoms on both sides: Potassium (K), Chlorine (Cl), and Oxygen (O). Confirm that the number of atoms for each element is equal on both sides.
Step 3: Check the second equation: \(2\ H_2 + O_2 \rightarrow 2\ H_2O\). Count Hydrogen (H) and Oxygen (O) atoms on both sides to verify balance.
Step 4: Check the third equation: \(Na + Cl_2 \rightarrow 2\ NaCl\). Count Sodium (Na) and Chlorine (Cl) atoms on both sides. Notice if the number of atoms matches or not.
Step 5: Check the fourth equation: \(C_3H_8 + 5\ O_2 \rightarrow 3\ CO_2 + 4\ H_2O\). Count Carbon (C), Hydrogen (H), and Oxygen (O) atoms on both sides to confirm if the equation is balanced.
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