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
Murljashka [212]
3 years ago
11

Consider the chemical equation. 2H2 + O2 mc022-1.jpg 2H2O What is the percent yield of H2O if 87.0 g of H2O is produced by combi

ning 95.0 g of O2 and 11.0 g of H2? Use mc022-2.jpg.
Chemistry
2 answers:
ch4aika [34]3 years ago
7 0
88.5% is the correct answer according to my calculations.
leonid [27]3 years ago
7 0

Answer :  The percent yield of H_2O is, 87.88%

Solution :

First we have to calculate the moles of H_2 and O_2.

\text{Moles of }H_2=\frac{\text{Mass of }H_2}{\text{Molar mass of }H_2}=\frac{11g}{2g/mole}=5.5moles

\text{Moles of }O_2=\frac{\text{Mass of }O_2}{\text{Molar mass of }O_2}=\frac{95g}{32g/mole}=2.9moles

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

2H_2+O_2\rightarrow 2H_2O

From the balanced reaction we conclude that

As, 2 moles of H_2 react with 1 mole of O_2

So, 5.5 moles of H_2 react with \frac{5.5}{2}=2.75 moles of O_2

That means, in the given balanced reaction, H_2 is a limiting reagent because it limits the formation of products and O_2 is an excess reagent.

The excess reagent remains (O_2)  = 2.9 - 2.75 = 0.15 moles

Now we have to calculate the moles of H_2O.

As, 2 moles of H_2 react with 2 moles of H_2O

As, 5.5 moles of H_2 react with 5.5 moles of H_2O

Now we have to calculate the mass of H_2O.

\text{Mass of }H_2O=\text{Moles of }H_2O\times \text{Molar mass of }H_2O

\text{Mass of }H_2O=(5.5mole)\times (18g/mole)=99g

Therefore, the mass water produces, 99 g

Now we have to calculate the percent yield of H_2O.

\%\text{ yield of }H_2O=\frac{\text{Actual yield of }H_2O}{\text{Theoretical yield of }H_2O}\times 100=\frac{87g}{99g}\times 100=87.88\%

Therefore, the percent yield of H_2O is, 87.88%

You might be interested in
What do calcium chloride, sodium carbonate, calcium carbonate, and potassium carbonate all have in common? (other than they reac
VARVARA [1.3K]

Answer:

the all dissolve in water

Explanation:

7 0
3 years ago
Read 2 more answers
each body cell of a goldfish contains 94 chromosomes.how many chromosomes are contained in a goldfish sex cell?
Shalnov [3]
47 I believe not 100% sure
8 0
3 years ago
Two moles of an ideal gas are placed in a container whose volume is 2.3 x 10^-3 m3. The absolute pressure of the gas is 6.9 x 10
PtichkaEL [24]

Answer:

K.E.=1.97\times 10^{-21}\ J

Explanation:

Given that:-

Pressure = 6.9\times 10^5\ Pa

The expression for the conversion of pressure in Pascal to pressure in atm is shown below:

P (Pa) = \frac {1}{101325} P (atm)

Given the value of pressure = 43,836 Pa

So,  

6.9\times 10^5\ Pa = \frac{6.9\times 10^5}{101325} atm

Pressure = 6.80977 atm

Volume = 2.3\times 10^{-3}\ m^3 = 2.3 L ( 1 m³ = 1000 L)

n = 2 mol

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

6.80977 atm × 2.3 L = 2 mol × 0.0821 L.atm/K.mol × T

⇒T = 95.39 K

The expression for the kinetic energy is:-

K.E.=\frac{3}{2}\times K\times T

k is Boltzmann's constant = 1.38\times 10^{-23}\ J/K

T is the temperature

So, K.E.=\frac{3}{2}\times 1.38\times 10^{-23}\times 95.39\ J

K.E.=1.97\times 10^{-21}\ J

3 0
3 years ago
Geetha took some grains of boiled rice in test tube A and Tina took boiled and chewed rice in test tube B. Both of then poured 1
Mekhanik [1.2K]

Answer:

Test tubes A and B turn a darker blue color.

Explanation:

Based on the information provided in the question it can be said that they should have noticed that Tube A and Tube B turned a dark blue color. This is because the starch turns the solution in the test tubes into a dark blue color due to the negative reaction caused by the conversion of starch present in salivary amylase

6 0
3 years ago
Draw a mechanism for the reaction of methylamine with propanoic acid. In the box to the left, draw any necessary curved arrows.
miv72 [106K]

Answer:

Explanation:

find the solution below

8 0
3 years ago
Other questions:
  • A gas sample at 83 °C occupies a volume of
    9·1 answer
  • Which contains the particles that are vibrating fastest?
    12·2 answers
  • Roger believes that he is following a healthy regime by taking lots of vitamin E everyday. What property of vitamin E makes Roge
    11·2 answers
  • Question 21 (2 points)
    10·2 answers
  • The volume of a pond being studied for the effects of acid rain is 35 kiloliters (kL). There are 1,000 liters (L) in 1 kL and 10
    10·1 answer
  • if a 500.0-g block of metal absorbs 5,016J of heat when its temperature changes from 20.00 Celcius, what is the specific heat?
    13·1 answer
  • What is the δg for the following reaction at 25°c? so3(g) h2o(l) → h2so4(l) given: so3(g):δg= –368 kjper mole h2o(l):δg= –237 kj
    6·1 answer
  • Oxygen Molecules taken in per breath: The Athletes result will be?
    14·1 answer
  • What are ionic compounds​
    11·1 answer
  • You are given a cube of lead that is 1.000 cm on each side. The density of lead is 11.35. How many atoms of lead are in the samp
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!