Part 3, Balance the follewing?(SHOWY YOUR WORKORNO CHEDIE: That means counting the atoms underweath.) 1. underline ( )HNO_(3)+underline ( )Mg(OH)_(4) square underline ( )Mg(NO_(3))_(4)+underline ( )H_(2)O 2. underline ( )Ca+underline ( )H_(2)Oarrow underline ( )Ca(OH)_(4)+underline ( )H_(4) 3. underline ( )K_(2) +underline ( )KI arrow underline ( )KI +underline ( )I_(2) __ 4. underline ( )Cu_(2)S +underline ( )O_(2)arrow underline ( )Cu_(2)O +underline ( )SO_(2) 5. underline ( )H_(2) +underline ( )O_(2) arrow underline ( )H_(2)O

Let's balance each chemical equation step by step:<br /><br />1. **$HNO_{3} + Mg(OH)_{4} \rightarrow Mg(NO_{3})_{4} + H_{2}O$**<br /><br /> To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.<br /><br /> - Nitrogen (N): There are 1 nitrogen atom on the left side and 4 nitrogen atoms on the right side.<br /> - Magnesium (Mg): There is 1 magnesium atom on the left side and 1 magnesium atom on the right side.<br /> - Oxygen (O): There are 3 oxygen atoms on the left side and 16 oxygen atoms on the right side.<br /> - Hydrogen (H): There are 4 hydrogen atoms on the left side and 2 hydrogen atoms on the right side.<br /><br /> To balance the equation, we need to multiply $HNO_{3}$ by 4 and $H_{2}O$ by 4:<br /><br /> $4HNO_{3} + Mg(OH)_{4} \rightarrow Mg(NO_{3})_{4} + 4H_{2}O$<br /><br />2. **$Ca + H_{2}O \rightarrow Ca(OH)_{4} + H_{4}$**<br /><br /> This equation is not balanced correctly. The correct balanced equation should be:<br /><br /> $Ca + 2H_{2}O \rightarrow Ca(OH)_{2} + 2H_{2}$<br /><br />3. **$K_{2} + KI \rightarrow KI + I_{2}$**<br /><br /> This equation is not balanced correctly. The correct balanced equation should be:<br /><br /> $2K + I_{2} \rightarrow 2KI$<br /><br />4. **$Cu_{2}S + O_{2} \rightarrow Cu_{2}O + SO_{2}$**<br /><br /> To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.<br /><br /> - Copper (Cu): There are 2 copper atoms on the left side and 2 copper atoms on the right side.<br /> - Sulfur (S): There is 1 sulfur atom on the left side and 1 sulfur atom on the right side.<br /> - Oxygen (O): There are 2 oxygen atoms on the left side and 3 oxygen atoms on the right side.<br /><br /> To balance the equation, we need to multiply $O_{2}$ by 2:<br /><br /> $Cu_{2}S + 2O_{2} \rightarrow Cu_{2}O + SO_{2}$<br /><br />5. **$H_{2} + O_{2} \rightarrow H_{2}O$**<br /><br /> To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.<br /><br /> - Hydrogen (H): There are 2 hydrogen atoms on the left side and 2 hydrogen atoms on the right side.<br /> - Oxygen (O): There are 2 oxygen atoms on the left side and 1 oxygen atom on the right side.<br /><br /> To balance the equation, we need to multiply $H_{2}O$ by 2:<br /><br /> $2H_{2} + O_{2} \rightarrow 2H_{2}O$<br /><br />In summary, the balanced equations are:<br /><br />1. $4HNO_{3} + Mg(OH)_{4} \rightarrow Mg(NO_{3})_{4} + 4H_{2}O$<br />2. $Ca + 2H_{2}O \rightarrow Ca(OH)_{2} + 2H_{2}$<br />3. $2K + I_{2} \rightarrow 2KI$<br />4. $Cu_{2}S + 2O_{2} \rightarrow Cu_{2}O + SO_{2}$<br />5. $2H_{2} + O_{2} \rightarrow 2H_{2}O$