practice: balancing equations #1\nshow all work on a separate sheet of paper. place coefficients (not…

practice: balancing equations #1\nshow all work on a separate sheet of paper. place coefficients (not answers) in the blanks provided. you can leave coefficients of \1\ blank.\n1. ___h₂ + ___o₂ → ___h₂o\n2. ___h₃po₄ + ___koh → ___k₃po₄ + ___h₂o\n3. ___k + ___b₂o₃ → ___k₂o + ___b\n4. ___hcl + ___naoh → ___nacl + ___h₂o\n5. ___na + ___nano₃ → ___na₂o + ___n₂\n6. ___c + ___s₈ → ___cs₂\n7. ___na + ___o₂ → ___na₂o₂\n8. ___n₂ + ___o₂ → ___n₂o₅\n9. ___h₃po₄ + ___mg(oh)₂ → ___mg₃(po₄)₂ + ___h₂o\n10. ___naoh + ___h₂co₃ → ___na₂co₃ + ___h₂o\n11. ___koh + ___hbr → ___kbr + ___h₂o\n12. ___h₂ + ___o₂ → ___h₂o₂\n13. ___na + ___o₂ → ___na₂o\n14. ___al(oh)₃ + ___h₂co₃ → ___al₂(co₃)₃ + ___h₂o\n15. ___al + ___s₈ → ___al₂s₃\n16. ___cs + ___n₂ → ___cs₃n\n17. ___mg + ___cl₂ → ___mgcl₂\n18. ___rb + ___rbno₃ → ___rb₂o + ___n₂\n19. ___c₆h₆ + ___o₂ → ___co₂ + ___h₂o\n20. ___n₂ + ___h₂ → ___nh₃\nreactions unit

practice: balancing equations #1\nshow all work on a separate sheet of paper. place coefficients (not answers) in the blanks provided. you can leave coefficients of \1\ blank.\n1. ___h₂ + ___o₂ → ___h₂o\n2. ___h₃po₄ + ___koh → ___k₃po₄ + ___h₂o\n3. ___k + ___b₂o₃ → ___k₂o + ___b\n4. ___hcl + ___naoh → ___nacl + ___h₂o\n5. ___na + ___nano₃ → ___na₂o + ___n₂\n6. ___c + ___s₈ → ___cs₂\n7. ___na + ___o₂ → ___na₂o₂\n8. ___n₂ + ___o₂ → ___n₂o₅\n9. ___h₃po₄ + ___mg(oh)₂ → ___mg₃(po₄)₂ + ___h₂o\n10. ___naoh + ___h₂co₃ → ___na₂co₃ + ___h₂o\n11. ___koh + ___hbr → ___kbr + ___h₂o\n12. ___h₂ + ___o₂ → ___h₂o₂\n13. ___na + ___o₂ → ___na₂o\n14. ___al(oh)₃ + ___h₂co₃ → ___al₂(co₃)₃ + ___h₂o\n15. ___al + ___s₈ → ___al₂s₃\n16. ___cs + ___n₂ → ___cs₃n\n17. ___mg + ___cl₂ → ___mgcl₂\n18. ___rb + ___rbno₃ → ___rb₂o + ___n₂\n19. ___c₆h₆ + ___o₂ → ___co₂ + ___h₂o\n20. ___n₂ + ___h₂ → ___nh₃\nreactions unit

Answer

Explanation:

Step1: Balance hydrogen and oxygen in $H_2 + O_2\rightarrow H_2O$

We need 2 moles of $H_2$ and 1 mole of $O_2$ to get 2 moles of $H_2O$. So the balanced equation is $2H_2+O_2\rightarrow2H_2O$.

Step2: Balance $H_3PO_4 + KOH\rightarrow K_3PO_4 + H_2O$

We need 1 mole of $H_3PO_4$ and 3 moles of $KOH$ to get 1 mole of $K_3PO_4$ and 3 moles of $H_2O$. So the balanced equation is $H_3PO_4 + 3KOH\rightarrow K_3PO_4+3H_2O$.

Step3: Balance $K + B_2O_3\rightarrow K_2O + B$

We need 6 moles of $K$ and 1 mole of $B_2O_3$ to get 3 moles of $K_2O$ and 2 moles of $B$. So the balanced equation is $6K + B_2O_3\rightarrow3K_2O+2B$.

Step4: Balance $HCl + NaOH\rightarrow NaCl + H_2O$

We need 1 mole of $HCl$ and 1 mole of $NaOH$ to get 1 mole of $NaCl$ and 1 mole of $H_2O$. So the balanced equation is $HCl + NaOH\rightarrow NaCl+H_2O$.

Step5: Balance $Na + NaNO_3\rightarrow Na_2O + N_2$

We need 10 moles of $Na$ and 2 moles of $NaNO_3$ to get 6 moles of $Na_2O$ and 1 mole of $N_2$. So the balanced equation is $10Na+2NaNO_3\rightarrow6Na_2O + N_2$.

Step6: Balance $C + S_8\rightarrow CS_2$

We need 4 moles of $C$ and 1 mole of $S_8$ to get 4 moles of $CS_2$. So the balanced equation is $4C+S_8\rightarrow4CS_2$.

Step7: Balance $Na + O_2\rightarrow Na_2O_2$

We need 2 moles of $Na$ and 1 mole of $O_2$ to get 1 mole of $Na_2O_2$. So the balanced equation is $2Na+O_2\rightarrow Na_2O_2$.

Step8: Balance $N_2 + O_2\rightarrow N_2O_5$

We need 2 moles of $N_2$ and 5 moles of $O_2$ to get 2 moles of $N_2O_5$. So the balanced equation is $2N_2 + 5O_2\rightarrow2N_2O_5$.

Step9: Balance $H_3PO_4 + Mg(OH)_2\rightarrow Mg_3(PO_4)_2 + H_2O$

We need 2 moles of $H_3PO_4$ and 3 moles of $Mg(OH)_2$ to get 1 mole of $Mg_3(PO_4)_2$ and 6 moles of $H_2O$. So the balanced equation is $2H_3PO_4+3Mg(OH)_2\rightarrow Mg_3(PO_4)_2 + 6H_2O$.

Step10: Balance $NaOH + H_2CO_3\rightarrow Na_2CO_3 + H_2O$

We need 2 moles of $NaOH$ and 1 mole of $H_2CO_3$ to get 1 mole of $Na_2CO_3$ and 2 moles of $H_2O$. So the balanced equation is $2NaOH + H_2CO_3\rightarrow Na_2CO_3+2H_2O$.

Step11: Balance $KOH + HBr\rightarrow KBr + H_2O$

We need 1 mole of $KOH$ and 1 mole of $HBr$ to get 1 mole of $KBr$ and 1 mole of $H_2O$. So the balanced equation is $KOH + HBr\rightarrow KBr+H_2O$.

Step12: Balance $H_2 + O_2\rightarrow H_2O_2$

We need 1 mole of $H_2$ and 1 mole of $O_2$ to get 1 mole of $H_2O_2$. So the balanced equation is $H_2+O_2\rightarrow H_2O_2$.

Step13: Balance $Na + O_2\rightarrow Na_2O$

We need 4 moles of $Na$ and 1 mole of $O_2$ to get 2 moles of $Na_2O$. So the balanced equation is $4Na+O_2\rightarrow2Na_2O$.

Step14: Balance $Al(OH)_3 + H_2CO_3\rightarrow Al_2(CO_3)_3 + H_2O$

We need 2 moles of $Al(OH)_3$ and 3 moles of $H_2CO_3$ to get 1 mole of $Al_2(CO_3)_3$ and 6 moles of $H_2O$. So the balanced equation is $2Al(OH)_3+3H_2CO_3\rightarrow Al_2(CO_3)_3 + 6H_2O$.

Step15: Balance $Al + S_8\rightarrow Al_2S_3$

We need 16 moles of $Al$ and 3 moles of $S_8$ to get 8 moles of $Al_2S_3$. So the balanced equation is $16Al+3S_8\rightarrow8Al_2S_3$.

Step16: Balance $Cs + N_2\rightarrow Cs_3N$

We need 6 moles of $Cs$ and 1 mole of $N_2$ to get 2 moles of $Cs_3N$. So the balanced equation is $6Cs+N_2\rightarrow2Cs_3N$.

Step17: Balance $Mg + Cl_2\rightarrow MgCl_2$

We need 1 mole of $Mg$ and 1 mole of $Cl_2$ to get 1 mole of $MgCl_2$. So the balanced equation is $Mg + Cl_2\rightarrow MgCl_2$.

Step18: Balance $Rb + RbNO_3\rightarrow Rb_2O + N_2$

We need 10 moles of $Rb$ and 2 moles of $RbNO_3$ to get 6 moles of $Rb_2O$ and 1 mole of $N_2$. So the balanced equation is $10Rb+2RbNO_3\rightarrow6Rb_2O + N_2$.

Step19: Balance $C_6H_6 + O_2\rightarrow CO_2 + H_2O$

We need 2 moles of $C_6H_6$ and 15 moles of $O_2$ to get 12 moles of $CO_2$ and 6 moles of $H_2O$. So the balanced equation is $2C_6H_6+15O_2\rightarrow12CO_2 + 6H_2O$.

Step20: Balance $N_2 + H_2\rightarrow NH_3$

We need 1 mole of $N_2$ and 3 moles of $H_2$ to get 2 moles of $NH_3$. So the balanced equation is $N_2+3H_2\rightarrow2NH_3$.

Answer:

  1. $2H_2+O_2\rightarrow2H_2O$
  2. $H_3PO_4 + 3KOH\rightarrow K_3PO_4+3H_2O$
  3. $6K + B_2O_3\rightarrow3K_2O+2B$
  4. $HCl + NaOH\rightarrow NaCl+H_2O$
  5. $10Na+2NaNO_3\rightarrow6Na_2O + N_2$
  6. $4C+S_8\rightarrow4CS_2$
  7. $2Na+O_2\rightarrow Na_2O_2$
  8. $2N_2 + 5O_2\rightarrow2N_2O_5$
  9. $2H_3PO_4+3Mg(OH)_2\rightarrow Mg_3(PO_4)_2 + 6H_2O$
  10. $2NaOH + H_2CO_3\rightarrow Na_2CO_3+2H_2O$
  11. $KOH + HBr\rightarrow KBr+H_2O$
  12. $H_2+O_2\rightarrow H_2O_2$
  13. $4Na+O_2\rightarrow2Na_2O$
  14. $2Al(OH)_3+3H_2CO_3\rightarrow Al_2(CO_3)_3 + 6H_2O$
  15. $16Al+3S_8\rightarrow8Al_2S_3$
  16. $6Cs+N_2\rightarrow2Cs_3N$
  17. $Mg + Cl_2\rightarrow MgCl_2$
  18. $10Rb+2RbNO_3\rightarrow6Rb_2O + N_2$
  19. $2C_6H_6+15O_2\rightarrow12CO_2 + 6H_2O$
  20. $N_2+3H_2\rightarrow2NH_3$