Question

What is the balanced equation for the chemical reaction C_7H_6O_2 + O_2 → CO_2 + H_2O?

Options:
A. 2C7H_6O_2 + 9O_2 → 14CO_2 + 6H_2O
B. C_7H_6O_2 + 8O_2 → 7CO_2 + 3H_2O
C. C_7H_6O_2 + 7O_2 → 7CO_2 + 3H_2O
D. 2C_7H_6O_2 + 7O_2 → 14CO_2 + 6H_2O


What is the balanced equation for the chemical reaction S_8 + O_2 → SO_3?

Options:
A. S_8 + 4O_2 → 8SO_3
B. S_8 + 3O_2 → 8SO_3
C. S_8 + 5O_2 → 8SO_3
D. S_8 + 2O_2 → 8SO_3


What is the balanced equation for the chemical reaction Zn + Pb(NO_3)2 → Zn(NO_3)2 + Pb?


A. Zn + 2Pb(NO_3)2 → Zn(NO_3)2 + 2Pb
B. Zn + Pb(NO_3)2 → Zn(NO_3)2 + Pb
C. 2Zn + 2Pb(NO_3)2 → 2Zn(NO_3)2 + 2Pb
D. 2Zn + Pb(NO_3)2 → 2Zn(NO_3)2 + Pb


What is the balanced equation for the chemical reaction FeCl_3 + NaOH → Fe(OH)3 + NaCl?

Options:
A. FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl
B. FeCl3 + 2NaOH → Fe(OH)3 + 2NaCl
C. 2FeCl3 + 3NaOH → 2Fe(OH)3 + 3NaCl
D. FeCl3 + 3NaOH → 3Fe(OH)3 + NaCl

Question 5:
What is the balanced equation for the chemical reaction NH4NO2 → N2 + H2O?

Options:
A. NH4NO2 → N2 + 2H2O
B. NH4NO2 → N2 + H2O
C. NH4NO2 → N2 + 3H2O
D. 2NH4NO2 → N2 + 4H2O

Question 6:
What is the balanced equation for the chemical reaction K2O + H2O → KOH?

Options:
A. K2O + H2O → 2KOH
B. 2K2O + H2O → 2KOH
C. K2O + 2H2O → 2KOH
D. K2O + H2O → KOH

Question 7:
What is the balanced equation for the chemical reaction Hg(NO3)2 → HgO + NO2 + O2?

Options:
A. Hg(NO3)2 → HgO + NO2 + O2
B. Hg(NO3)2 → HgO + NO2 + O2 + O2
C. 2Hg(NO3)2 → 2HgO + 2NO2 + O2
D. Hg(NO3)2 → HgO + 2NO2 + O2

Question 8:
What is the balanced equation for the chemical reaction Pb(NO3)2 + Na2CO3 → PbCO3 + NaNO3?

Options:
A. Pb(NO3)2 + Na2CO3 → PbCO3 + 2NaNO3
B. Pb(NO3)2 + Na2CO3 → PbCO3 + NaNO3
C. 2Pb(NO3)2 + Na2CO3 → 2PbCO3 + 2NaNO3
D. Pb(NO3)2 + 2Na2CO3 → PbCO3 + 4NaNO3

Question 9:
What is the balanced equation for the chemical reaction C8H18 + O2 → CO2 + H2O?

Options:
A. C8H18 + 25O2 → 16CO2 + 18H2O
B. C8H18 + 12.5O2 → 8CO2 + 9H2O
C. 2C8H18 + 25O2 → 16CO2 + 18H2O
D. C8H18 + 8O2 → 8CO2 + 9H2O

Question 10:
What is the balanced equation for the chemical reaction KBr + Cl2 → KCl + Br2?

Options:
A. KBr + 2Cl2 → 2KCl + Br2
B. KBr + Cl2 → KCl + Br2
C. KBr + 3Cl2 → 3KCl + Br2
D. 2KBr + Cl2 → 2KCl + Br2

Answer 1

The balanced equation is 2C₇H₆O₂ + 7O₂ → 14CO₂ + 6H₂O.

Step-by-step explanation:

The balanced equation for the chemical reaction C₇H₆O₂ + O₂ → CO₂ + H₂O is

Option D: 2C₇H₆O₂ + 7O₂ → 14CO₂ + 6H₂O

In this reaction, two molecules of C₇H₆O₂ react with seven molecules of O₂ to produce fourteen molecules of CO₂ and six molecules of H₂O. By ensuring that the same number of atoms of each element is present on both sides, the equation is balanced.