Which chemical equation is balanced to show that mass is conserved during the reaction?
A. Na + Cl₂ --> NaCl
B. 2H₂ O₂ --> 2H O + O₂
C. CH₄ + O₂ --> CO₂ + 2H₂ O
D. AgNO₃ + MgCl₂ --> AgCl +MgNO₃ ****
is it D?
Nope, Cl are not balanced in D. Relook at C
Yes, the correct answer is D. AgNO₃ + MgCl₂ → AgCl + MgNO₃. This equation is balanced and demonstrates the conservation of mass.
To determine if a chemical equation is balanced, we need to ensure that the same number and types of atoms are present on both sides of the equation. Here's how you can check the balance of option D:
1. Count the number of atoms of each element on each side of the equation:
On the left side (reactants):
- Ag: 1
- N: 1
- O: 3
- Cl: 2
- Mg: 1
On the right side (products):
- Ag: 1
- N: 1
- O: 3
- Cl: 1
- Mg: 1
2. Compare the counts to ensure they are the same. In this case, we can see that the number of atoms for each element is the same on both sides of the equation, indicating a balanced equation.
So, the correct balanced chemical equation to demonstrate the conservation of mass in this case is D. AgNO₃ + MgCl₂ → AgCl + MgNO₃.