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2 years ago

If 4.00 moles of fluorine are reacted with excess HBr, how many grams of bromine will be formed

Chemistry

1 answer:

Aleonysh [2.5K]2 years ago

5 0

The mass of bromine that would be formed is 639 g

<h3>Stoichiometry</h3>

From the question,

We are to determine how many grams of bromine would be formed

First, we will write the balanced chemical equation for the reaction,

The balanced chemical equation for the reaction is

F₂ + 2HBr → 2HF + Br₂

This means, 1 mole of fluorine reacts with 2 moles of HBr to produce 1 mole of bromine.

Then,

4.00 moles of fluorine will react with excess HBr to produce 4.00 moles of bromine.

Therefore,

The number of moles of bromine produced is 4.00 moles

Now, for the mass of bromine formed,

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of bromine = 159.808 g/mol

Then,

Mass of bromine formed = 4.00 × 159.808

Mass of bromine formed = 639.232 g

Mass of bromine formed ≅ 639 g

Hence, the mass of bromine that would be formed is 639 g.

Learn more on Stoichiometry here: brainly.com/question/24691353

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Compare the sizes and directions of the arrows in each picture representing forces acting on the person. Which of the following

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Answer:

A, is a girl balancing on her hands, a red arrow is pointing up and is the same length as an arrow pointing down.

Explanation:

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6 0

3 years ago

A mixture of carbon dioxide and helium gases is maintained in a 7.91 L flask at a pressure of 1.42 atm and a temperature of 33 °

Crank

Answer:

The gas mixture contains 1.038 grams of helium

Explanation:

Step 1: Data given

Volume of the flask = 7.91 L

Total Pressure = 1.42 atm

Temperature = 33 °C

Mass of CO2 = 8.25 grams

Molar mass of CO2 = 44.01 g/mol

Molar mass of He = 4 g/mol

Step 2: Calculate total number moles of gas

p*V = n*R*T

⇒ p = the pressure = 1.42 atm

⇒ V = the volume = 7.91 L

⇒ n= the number of moles = TO BE DETERMINED

⇒ R = the gas constant = 0.08206 L* atm/K*mol

⇒ T = the temperature = 33 °C = 306 Kelvin

n = (p*V)/(R*T)

n = (1.42*7.91)/(0.08206 * 306)

n = 0.447 moles

Step 3: Calculate moles of CO2

Moles CO2 = mass CO2 / Molar mass CO2

Moles CO2 = 8.25 grams / 44.01 g/mol

Moles CO2 = 0.1875 moles

Step 4: Calculate moles of Helium

Moles Helium = total moles of gas - moles of CO2

Moles Helium = 0.447 - 0.1875 = 0.2595 moles of helium

Step 5: Calculate mass of helium

Mass of helium = moles of helium * molar mass of helium

Mass of helium = 0.2595 moles * 4 g/mol

Mass of helium = 1.038 grams

The gas mixture contains 1.038 grams of helium

8 0

3 years ago

an unknown sample with a mass of 50.0 grams changes from an initial temperature of 22.5°C to a final temperature of 32.4°C. It i

makvit [3.9K]

Answer:

Aluminum

Explanation:

7 0

3 years ago

Acids taste a. sweet. c. bitter. b. sour. d. salty

Gnesinka [82]

The answer is (b) for example lemon juice is an acid and it tastes sour.
Hope this helps :).

4 0

3 years ago

1. The speed limit on most city streets is (25 miles). How many meters per minute

irina1246 [14]

Answer:

$Speed = 670.56 \frac{m}{min}$

Explanation:

Given

$Speed = \frac{25 mi}{hr}$

Required

Convert to meters per minutes

$Speed = \frac{25 mi}{hr}$

Start by converting the speed from miles to meters

$1\ mile = 1609.34\ meters.$

So, we have:

$Speed = \frac{25 * 1609.34\ m}{hr}$

$Speed = \frac{40233.5\ m}{hr}$

Next, we convert time from hours to minutes

$1\ hour = 60\ minutes$

So, we have:

$Speed = \frac{40233.5\ m}{60\ min}$

$Speed = 670.56 \frac{m}{min}$

Hence, the equivalent of 25 miles per hour is 670.56 meters per minutes

3 0

3 years ago