Question

1. balance the equation by typing the correct numbers in each blank. type in 1 if the coefficient is 1.

p₄ + br₂ → __ pbr₃

1. balance the equation by typing the correct numbers in each blank. type in 1 if the coefficient is 1.

licl + br₂ → libr + cl₂

1. balance the equation by typing the correct numbers in each blank. type in 1 if the coefficient is 1.

pbbr₂ + hcl → hbr + pbcl₂

Explanation:

Step1: Balance P atoms

$1\ \text{P}_4 + \underline{\quad}\ \text{Br}_2
ightarrow 4\ \text{PBr}_3$

Step2: Balance Br atoms

$1\ \text{P}_4 + 6\ \text{Br}_2
ightarrow 4\ \text{PBr}_3$

---

Step1: Balance Cl atoms

$2\ \text{LiCl} + \underline{\quad}\ \text{Br}_2
ightarrow \underline{\quad}\ \text{LiBr} + 1\ \text{Cl}_2$

Step2: Balance Li and Br atoms

$2\ \text{LiCl} + 1\ \text{Br}_2
ightarrow 2\ \text{LiBr} + 1\ \text{Cl}_2$

---

Step1: Balance Pb atoms

$1\ \text{PbBr}_2 + \underline{\quad}\ \text{HCl}
ightarrow \underline{\quad}\ \text{HBr} + 1\ \text{PbCl}_2$

Step2: Balance Cl and Br atoms

$1\ \text{PbBr}_2 + 2\ \text{HCl}
ightarrow 2\ \text{HBr} + 1\ \text{PbCl}_2$

Answer:

1. $1\ \text{P}_4 + 6\ \text{Br}_2

ightarrow 4\ \text{PBr}_3$

1. $2\ \text{LiCl} + 1\ \text{Br}_2

ightarrow 2\ \text{LiBr} + 1\ \text{Cl}_2$

1. $1\ \text{PbBr}_2 + 2\ \text{HCl}

ightarrow 2\ \text{HBr} + 1\ \text{PbCl}_2$