1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tanzania [10]
3 years ago
11

How many MOLES of boron tribromide are present in 3.20 grams of this compound ?

Chemistry
1 answer:
Dmitriy789 [7]3 years ago
7 0

Answer:

1) There are 0.0128 moles of BBr3 present in 3.20 grams of this compound

2) There are 909.35 grams of BBr3 present in 3.63 moles of this compound

Explanation:

<u>Step 1: </u>Given data

Boron tribromide = BBr3

Molar mass of Boron = 10.81 g/mole

Molar mass of Bromide = 79.9 g/mole

Molar mass of Boron tribromide = 10.81 + 3*79.9 = 250.51 g/mole

<u>Step 2:</u> Calculating number of moles

Number of moles = mass / molar mass

Number of moles of BBr3 = 3.20 grams / 250.51 g/mole

Number of moles of BBr3 = 0.0128 moles

<u>Step 3:</u> Calculating mass

If we have 3.63 moles of boron tribromide (= BBr3)

Mass of BBr3 = number of moles of BBr3 * Molar mass of BBr3

Mass of BBr3 = 3.63 moles * 250.51 g/mole

Mass of BBr3 = 909.35 grams

You might be interested in
Calculation: If a compound is 14.40% hydrogen by mass and 85.60% carbon by mass, what is the empirical formula?
IgorLugansk [536]

Answer:

CH2

Explanation:

We are given that a compound is 14.40% hydrogen and 85.60% carbon.

Let the mass of the substance be 100g.

Mass of the hydrogen: 14.40% of 100 = 14.40 g

Mass of the carbon: 85.60% of 100 = 85.60 g

Now, let's find the moles of hydrogen:

14.40 g*\frac{1 mole}{1gH} = 14.40 mole

Moles of carbon:

85.60g*\frac{1 mol}{12gC} = 7.13mol

Let's put these in a ratio and simplify:

7.13 mole C: 14.40 mole H

1 mole C: 2 mole H

Therefore, the empirical formula of this compound is CH2.

Hope this helps!! If you have any questions about my work, please let me know in the comments!

3 0
2 years ago
Iron filings were mixed together with salt crystals. What unique property of iron would be BEST to separate the filings from the
Sedaia [141]
Iron has magnetic properties, so you would just need to hold a magnet over the mixture and the filings will come right out.
4 0
3 years ago
Read 2 more answers
PLS HELP A gas has a volume of 250 mL at 96.5 kPa. What will the pressure of the gas be if the
ella [17]

Answer:

Solve the following problems (assuming constant temperature). Assume all numbers are 3 sig figs. 1. A sample of oxygen gas occupies a volume of 250 mL at 740 torr pressure. ... the gas exert if the volume was decreased to 2.00 liters? ... A 175 mL sample of neon had its pressure changed from 75.0 kPa to 150 kPa.

Explanation:

8 0
3 years ago
How much heat is required to increase the temperature of 198.5 grams of water from 25.0
velikii [3]

5.27*10^4 (52,700.)

4 0
3 years ago
Describe radiation in a full sentence
Mandarinka [93]

Answer:

Radiation is energy that comes from a source and travels through space at the speed of light.

3 0
2 years ago
Other questions:
  • 4.0 L sample of methane gas is collected at 30.0c,<br> what is the volume of the sample at -8c?
    7·1 answer
  • What are the benefits and drawbacks of international cooperation in space exploration?
    8·1 answer
  • 1.Grassland are where most of our_____ comes from?
    9·2 answers
  • Which fatty acid salt is soluble in water solutions?
    12·1 answer
  • Which of the following atoms have the same number of neutrons as an atom of Aluminum-27?
    5·2 answers
  • A piece of solid tin is submerged in silver nitrate solution a reaction occurs producing tin(IV) nitrate solution and solid silv
    15·1 answer
  • _NH, +_02 - _ NO, +_ H,0
    14·1 answer
  • A serving of Frosted Flakes cereal contains 235,000 J of energy. Calculate the change in temperature (ΔT) that would occur if th
    15·1 answer
  • Mitotic cyclins control the progression of S phase and mitosis. G1 phase and G2 phase. S phase and G2 phase. G2 phase and mitosi
    15·2 answers
  • As energy moves out from the sun’s core toward its surface, it first travels by __________, then by __________, and then by ____
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!