when balanced and simplified, what is the coefficient for co₂ in the following equation: __khco₃(s) →…
when balanced and simplified, what is the coefficient for co₂ in the following equation: __khco₃(s) → __k₂co₃(s) + __h₂o(g) + __co₂(g) 2 3 4 1 when balanced and simplified, what is the coefficient for hco₃ in the following equation: zn + __ hco₃ → zn(clo₂)₂ + h₂ 2 3 4 5 when balanced and simplified, what is the coefficient for h₂ in the following equation: __pb(s) + __hno₃(aq) → __pb(no₃)4(aq) + __h₂(g) 1 2 3 4
Answer
Explanation:
Step1: Balance the first equation
We start with the equation $\mathrm{KHCO_3}(s)\to\mathrm{K_2CO_3}(s)+\mathrm{H_2O}(g)+\mathrm{CO_2}(g)$. To balance potassium ($K$), we put a 2 in front of $\mathrm{KHCO_3}$. The balanced equation is $2\mathrm{KHCO_3}(s)=\mathrm{K_2CO_3}(s)+\mathrm{H_2O}(g)+\mathrm{CO_2}(g)$. The coefficient of $\mathrm{CO_2}$ is 1.
Step2: Balance the second equation
For the equation $\mathrm{Zn}+\mathrm{HCOOH}\to\mathrm{Zn(COOH)_2}+\mathrm{H_2}$. First, balance the number of formic - acid ($\mathrm{HCOOH}$) molecules. Since there are 2 carboxyl - groups in $\mathrm{Zn(COOH)_2}$, we need 2 molecules of $\mathrm{HCOOH}$. The balanced equation is $\mathrm{Zn} + 2\mathrm{HCOOH}=\mathrm{Zn(COOH)_2}+\mathrm{H_2}$. The coefficient of $\mathrm{HCOOH}$ is 2.
Step3: Balance the third equation
For the equation $\mathrm{Pb}(s)+\mathrm{HNO_3}(aq)\to\mathrm{Pb(NO_3)_4}(aq)+\mathrm{H_2}(g)$. First, balance the nitrate ($\mathrm{NO_3}$) groups. Since there are 4 nitrate groups in $\mathrm{Pb(NO_3)_4}$, we need 4 molecules of $\mathrm{HNO_3}$. The balanced equation is $\mathrm{Pb}(s)+4\mathrm{HNO_3}(aq)=\mathrm{Pb(NO_3)_4}(aq)+2\mathrm{H_2}(g)$. The coefficient of $\mathrm{H_2}$ is 2.
Answer:
- 1
- 2
- 2