Question

question 10 1 pts which of the following equations is not balanced? 2 al₂o₃ → 4 al + 3 o₂ k₂cro₄ + pb(no₃)₂ → 2 kno₃ + pbcro₄ c₇h₁₆ + 10 o₂ → 7 co₂ + 8 h₂o 4 fe₃o₄ + o₂ → 6 fe₂o₃ 3 agno₃ + (nh₄)₃po₄ → ag₃po₄ + 3 nh₄no₃

Explanation:

Step1: Check the first equation

For \(2Al_2O_3
ightarrow4Al + 3O_2\),

• Al: \(2\times2 = 4\) on the left, \(4\) on the right.
• O: \(2\times3=6\) on the left, \(3\times2 = 6\) on the right.

Step2: Check the second equation

For \(K_2CrO_4+Pb(NO_3)_2
ightarrow2KNO_3+PbCrO_4\),

• K: \(2\) on the left, \(2\times1 = 2\) on the right.
• Cr: \(1\) on the left, \(1\) on the right.
• O: \(4+(2\times3)=10\) on the left, \((2\times3)+4 = 10\) on the right.
• Pb: \(1\) on the left, \(1\) on the right.
• N: \(2\times1 = 2\) on the left, \(2\times1=2\) on the right.

Step3: Check the third equation

For \(C_7H_{16}+10O_2
ightarrow7CO_2+8H_2O\),

• C: \(7\) on the left, \(7\times1 = 7\) on the right.
• H: \(16\) on the left, \(8\times2=16\) on the right.
• O: \(10\times2 = 20\) on the left, \((7\times2)+(8\times1)=22\) on the right.

Step4: Check the fourth equation

For \(4Fe_3O_4+O_2
ightarrow6Fe_2O_3\),

• Fe: \(4\times3=12\) on the left, \(6\times2 = 12\) on the right.
• O: \((4\times4)+2 = 18\) on the left, \(6\times3=18\) on the right.

Step5: Check the fifth equation

For \(3AgNO_3+(NH_4)_3PO_4
ightarrow Ag_3PO_4+3NH_4NO_3\),

• Ag: \(3\) on the left, \(3\) on the right.
• N: \(3\times1+3\times1 = 6\) on the left, \(3\times1+3\times1=6\) on the right.
• O: \(3\times3+4 = 13\) on the left, \(4 + 3\times3=13\) on the right.
• P: \(1\) on the left, \(1\) on the right.
• \(NH_4\): \(3\) on the left, \(3\) on the right.

Answer:

\(C_7H_{16}+10O_2
ightarrow7CO_2+8H_2O\)