Question

Check all equations that are equivalent.

a) h(b1+ b2)
b) 2A = 161+ b2
c) 2A
d) 51 = -52
e) z{4-5 no2
f) 2
g) هان
h) -
i) b1 =
j) B
k) 1 =
l) h
m) 2

Answer 1

Only equation b (C₂H4(g) + 2O2(g) → 2CO2(g) + 2H₂O(l)) is balanced. The others (2Hg + O2 → Hg2O2 and Mg(NO3)2 + 2Li → Mg + 2LiNO3) are not balanced.

Step-by-step explanation:

Chemical Equation Balancing

Checking the balance of chemical equations involves ensuring that there is an equal number of each type of atom on both sides of the reaction. This reflects the conservation of matter—matter is neither created nor destroyed in a chemical reaction.

• Equation a: 2Hg(e) + O2(g) → Hg2O2 (s) is not balanced. The product should be 2HgO to balance both mercury and oxygen atoms.
• Equation b: C₂H4(g) + 2O2(g) → 2CO2(g) + 2H₂O(l) is balanced, with 2 carbon, 4 hydrogen, and 4 oxygen atoms on each side.
• Equation c: Mg(NO3)2(s) + 2Li(s) → Mg(s) + 2LiNO3(s) is not balanced. The number of nitrate groups and lithium atoms do not match on both sides of the equation.