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4 years ago

How many liters of bromine are needed to produce 12 miles of aluminum bromide?

Chemistry

1 answer:

VikaD [51]4 years ago

4 0

Answer:

0.929L of Br2

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

2Al + 3Br2 —> 2AlBr3

Next, we shall determine the number of mole of Br2 needed to produce 12 moles of AlBr3. This is illustrated below:

From the balanced equation above,

3 moles of Br2 reacted to produce 2 moles of AlBr3.

Therefore, Xmol of Br2 will produce 12 moles of AlBr3 i.e

Xmol of Br2 = (3 x 12)/2

Xmol of Br2 = 18 moles

Therefore, 18 moles of Br2 reacted to produce 12 moles of AlBr3.

Next, we shall convert 18 moles of Br2 to grams. This is illustrated below:

Number of mole Br2 = 18 moles

Molar mass of Br2 = 2 x 80 = 160g/mol

Mass of Br2 =.?

Mass = mole x molar mass

Mass of Br2 = 18 x 160 = 2880g

Next, we determine the volume of Br2 used in the reaction as follow:

Mass of Br2 = 2880g

Density of Br2 = 3.1g/mL

Volume of Br2 =..?

Density = Mass /volume

Volume = Mass /Density

Volume of Br2 = 2880/3.1

Volume of Br2 = 929mL

Finally, we shall convert 929mL to L.

1000mL = 1L

Therefore, 929mL = 929/1000 = 0.929L

Therefore, 0.929L of Br2 were used in the reaction.

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what is the freezing point of a 0.195m aqueous solution of K2S? (Report amount to three decimal points)

Solnce55 [7]

The freezing point depression of water is 1.86°C/m.kg
K2S dissociates: 
K2S ↔ 2K+ + S 2- 
1mol K2S will produce 3 mol of ions. 
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Depression of freezing point = Kf * i* m 
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4 0

3 years ago

PLEASE I REALLY NEED ANSWER REAL QUICK

DENIUS [597]

Answer:

b. 760 g

Explanation:

The mass of the solution = 800 g

5% of NaCl by mass of the solution can be determined as follows;

5% of 800 = $\frac{5}{100}$ × 800

= 5 × 8

= 40 g

The mass of NaCl in the solution is 40 g.

The mass of water = mass of solution - mass of NaCl

= 800 - 40

= 760 g

Therefore, the mass of water required is 760 g.

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4 years ago

A gas exerts a pressure of 0.62 atm. Convert this to kPa and mmHg. Be sure to show your work.

IRINA_888 [86]

Answer:

The answer to your question is 0.62 atm = 62.82 kPa = 471.2 mmHg

Explanation:

Data

P = 0.62 atm

P = ? kPa

P = ? mmHg

Process

1.- Look for the conversion factor of atm to kPa and mmHg

1 atm = 101.325 kPa

1 atm = 760 mmHg

2.- Do the conversions

1 atm ----------------- 101.325 kPa

0.62 atm ------------ x

x = (0,62 x 101.325) / 1

x = 62.82 kPa

1 atm ------------------ 760 mmHg

0.62 atm ------------ x

x = (0.62 x 760)/1

x = 471.2 mmHg

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4 years ago

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4 years ago

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3 years ago

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