3 years ago

Balance the following equation: ___ Fe + _Br2 -----> ___ FeBr3

Physics

1 answer:

Nataly_w [17]3 years ago

7 0

Answer:

2 Fe + 3 Br₂ → 2 FeBr₃

Explanation:

There are 2 Br atoms on the left, and 3 on the right. So put a 3 in front of Br₂, and a 2 in front of FeBr₃.

_Fe + 3 Br₂ → 2 FeBr₃

Now there's 6 Br atoms on each side. There are 2 Fe atoms on the right side, so put a 2 in front of Fe:

2 Fe + 3 Br₂ → 2 FeBr₃

Now the equation is balanced.

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What is the freezing point of an aqueous solution that boils at 101 degrees C? Kfp = 1.86 K/m and Kbp = 0.512 K/m. Enter your an

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-3.63 degree Celsius

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We are given that

Boiling point of solution= $T_b=101^{\circ}$ C

Boiling point water=100 degree Celsius

$K_f=1.86K/m$

$K_b=0.512 K/m$

$\Delta T_b=T-T_0$

Where $T$ =Boiling point of solution

$T_0=$ Boiling point of pure solvent

$\Delta T_b=101-100=1^{\circ}$ C

$\Delta T_b=k_bm$

Using the formula

$1=0.512\times m$

Molality, $m=\frac{1}{0.512}$ m

$\Delta T_f=k_fm$

Using the formula

$\Delta T_f=\frac{1}{0.512}\times 1.86$

$\Delta T_f=3.63 C$

We know that

$\Delta T_f=T_0-T_1$

Where $T_0$ =Freezing point of solvent

$T_1=$ Freezing point of solution

Using the formula

$3.63=0-T_1$

Freezing point of water=0 degree Celsius

$T_1=0-3.63=-3.63 C$

Hence, the freezing point of solution=-3.63 degree Celsius

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2 years ago

Balance the following equation: _____ Fe + _____Br2 -----> _____ FeBr3

Balance the following equation: ___ Fe + _Br2 -----> ___ FeBr3