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
scZoUnD [109]
3 years ago
7

Calculate the number of moles of excess reactant that will be left-over when 50.0 g of KI react with 50.0 g of Br2: 2KI + Br2 2K

Br + I2

Chemistry
2 answers:
Ugo [173]3 years ago
4 0
Hope this helps you.

kvv77 [185]3 years ago
3 0

Answer : The moles of excess reactant, Br_2 is, 0.1625 mole.

Explanation : Given,

Mass of KI = 50 g

Mass of Br_2 = 50 g

Molar mass of KI = 166 g/mole

Molar mass of Br_2 = 160 g/mole

First we have to calculate the moles of KI and Br_2.

\text{Moles of }KI=\frac{\text{Mass of }KI}{\text{Molar mass of }KI}=\frac{50g}{166g/mole}=0.301moles

\text{Moles of }Br_2=\frac{\text{Mass of }Br_2}{\text{Molar mass of }Br_2}=\frac{50g}{160g/mole}=0.313moles

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

2KI+Br_2\rightarrow 2KBr+I_2

From the balanced reaction we conclude that

As, 2 moles of KI react with 1 mole of Br_2

So, 0.301 moles of KI react with \frac{0.301}{2}=0.1505 moles of Br_2

From this we conclude that, Br_2 is an excess reagent because the given moles are greater than the required moles and KI is a limiting reagent and it limits the formation of product.

The moles of excess reactant, Br_2 = Given moles - Required moles

The moles of excess reactant, Br_2 = 0.313 - 0.1505 = 0.1625 mole

Therefore, the moles of excess reactant, Br_2 is, 0.1625 mole.

You might be interested in
The smallest particle of matter that retains the chemical properties of carbon is a carbon:
Drupady [299]
The answer will be Carbon Molecule
7 0
3 years ago
Which of the following is not a use for line graphs? *
kati45 [8]

Answer:

c

Explanation:

because nothing is changing, so what are you gonna track with the line graph

6 0
3 years ago
Read 2 more answers
6. Consider the reaction: CzHo (g) + 02 (8) - 4 CO2(g) + 6H2O (1)
deff fn [24]

Answer:

1120 gm

Explanation:

6. Consider the reaction: CzHo (g) + 02 (8) - 4 CO2(g) + 6H2O (1)

(a) Balance the equation.

(b) How many grams of oxygen are required to react with 10 moles of ethane for a complete

combustion reaction?

FIRST, CORRECT THE EQUATION THEN BALANCE

2C2H6(G) + 7O2------------>  4CO2  + 6H2O

so for 10 moles of ethane, we need

7 X 5 = 35 MOLES O2

=35 MOLES O2

O2 HAS A MOLAR MASS OF 2X16 = 32 gm

35 MOLES OF O2 HAS A MASS OF 35 X 32 =1120 gm

6 0
3 years ago
What is bed rock made of
Darya [45]

Answer:

Bedrock is the hard, solid rock beneath surface materials such as soil and gravel.

Bedrock can be made of most types of rock, such as granite, limestone, or sandstone.

Hope this helps!

8 0
3 years ago
Read 2 more answers
4. a compound called pyrene has the empirical formula c8h5. when 4.04 g of pyrene is dissolved in 10.00 g of benzene, the boilin
e-lub [12.9K]

The molecular mass of pyrene is 204.4 g/mol.

From;

ΔT = Kb m i

Where;

  • ΔT = boiling point elevation
  • Kb = boiling point constant
  • m = molality
  • i = Van't Hoff factor

Since the compound is molecular; i = 1

The number of moles of pyrene = 4.04 g/MM

Where; MM = molar mass of pyrene

molality = number of moles of pyrene/mass of solvent in Kg

The mass of solvent = 10 g or 0.01 Kg

molality =  4.04 g/MM/0.01

ΔT = Boiling point of solution - Boiling point of pure solvent

ΔT = 85.1°C - 80.1°C

ΔT = 5°C

5 = 2.53 × 4.04 g/MM/0.01 × 1

5 = 10.22 × 1/0.01 MM

0.05MM = 10.22

MM= 10.22/0.05

MM= 204.4 g/mol

Learn more: brainly.com/question/2292439

3 0
2 years ago
Other questions:
  • Identify this reaction.
    12·1 answer
  • You wash dishes for a chemistry laboratory to make extra money for laundry. You earn 12 dollars/hour, and each shift lasts 75 mi
    9·2 answers
  • The "correct" mass of the cylinder had been previously determined to be 27.20 grams. What was the percent error on his first wei
    8·1 answer
  • After Frida stops exercising, she continues to breathe heavily. What is most likely occurring in her body? Heavy breathing durin
    10·2 answers
  • Equilibrium is established between a liquid and its vapor when A. the rate of evaporation equals the rate of condensation. B. eq
    7·1 answer
  • Is Oxygen more reactive than Beryllium
    7·2 answers
  • Nitrogen and carbon can form ___ bonds in which six electrons ( three pairs ) are shared.
    9·1 answer
  • Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes
    15·2 answers
  • Find the molarity of a solution made by dissolving 12.5 g sodium carbonate in 500.0 mL total solution
    15·1 answer
  • Why did plants perform cellular respiration?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!