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
Andreas93 [3]
3 years ago
10

An industrial vat contains 650 grams of solid lead(II) chloride formed from a reaction of 870 grams of lead(II) nitrate with exc

ess hydrochloric acid. This is the equation 2HCl + Pb(NO3)2 = 2HNO3 + PbCl2 what is the percent yield of lead(II) chloride?
Chemistry
2 answers:
Illusion [34]3 years ago
6 0

Answer:

The percent yield of lead(II) chloride is 88,8%

Explanation:

2HCl + Pb(NO3)2 → 2HNO3 + PbCl2

By stoichiometry, relation between Pb(NO3)2 and PbCl2 IS 1:1 mol

So 1 mol of Pb(NO3)2, makes 1 mol of PbCl2

I use 870 g of lead (II) nitrate, which means 2,63 moles

Molar mass - Pb(NO3)2-: 331,2 g/mol

Mass/Molar mass : Moles → 810 g  /331 g/m = 2,63 moles

In conclussion, I obtanied 2,63 moles of PbCl2 but this result is at 100% yield of reaction, as I only formed 650 gr of PbCl2 I have to find out my yield.

Molar mass -PbCl2-: 278,1 g/mol

Mass/Molar mass : Moles → 650g / 278,1 g/mol = 2,34 moles

2,63 moles ______ 100 %

2,34 moles ______ (2,34 . 100) /2,63 = 88,8 %

yulyashka [42]3 years ago
5 0

Answer:

89 for PLATO users

Explanation:

You might be interested in
5. Molds and bacteria contain hydrolytic enzymes used to breakdown proteins,
Tpy6a [65]

Answer:Temperature affects storage time and food deteriorates faster at higher temperatures. Microorganisms grow rapidly at room temperature . Thus to slow microbial growth, enzymatic and oxidative processes, food must be stored at room temperature.

Due to decomposition reactions with oxygen or carbon dioxide in the air, meat begins to feel slimy and smell spoiled. ... Because of its smaller surface area, the unsliced meat would have less collisions and therefore, a slower reaction rate.

Explanation:

5 0
3 years ago
Two teaspoons of salt are added to a glass of water which is then stirred until no more salt grains can be seen. Two more teaspo
Naya [18.7K]
Hello!

After the addition of the last two teaspoons of salt, the solution is saturated

A solution is saturated when it has the highest amount of solute (in this case the salt) that the solvent (in this case the water) can dissolve at that pressure and temperature. 

Visually, a saturated solution can be detected when the adding of more solute results in the settling of solute grains (in this case salt) at the bottom of the container, because the solvent couldn't dissolve them at that pressure and temperature. That's why we can say that the solution is saturated.

Have a nice day!  
8 0
3 years ago
Read 2 more answers
Which two functional groups are always found in amino acids?
Dmitry_Shevchenko [17]
The answer would be the amino group and the carboxyl group
hope this helpssss
6 0
3 years ago
A can of butane with a pressure of 2 atm at 283k has its pressure increased to a new pressure of 5 atm. What is the temperature
Ber [7]

Answer:

New temperature T2 = 707.5 K (Approx.)

Explanation:

Given:

Old pressure P1 = 2 atm

Old temperature T1 = 283 K

New Pressure P2 = 5 atm

Find:

New temperature T2

Computation:

Using Gay-Lussac law;

P1 / T1 = P2 / T2

So,

2 / 283 = 5 / T2

New temperature T2 = 707.5 K (Approx.)

6 0
3 years ago
How fast is an electron travelling If it has a wavelength of 8.20 km?
Lemur [1.5K]

The electron is travelling with a velocity of 1.123 × 10⁷m/s if it has a wavelength of 8.20 km.

<h3>How to calculate velocity of an electron?</h3>

The velocity at which an electron travels can be calculated using the following formula:

λ = h/mv

Where;

  • H = Planck's constant
  • m = mass of electron
  • v = velocity of electron
  • λ = wavelength

  • Planck's constant (h) = 6.626 × 10−³⁴ J⋅s.
  • mass of electron (m) = 9.109 × 10−³¹ kg
  • wavelength = 8200m

8200 = 6.626×10−³⁴ / 9.109 × 10−³¹V

8200 = 7.3 × 10-⁴V

V = 8200 ÷ 7.3 × 10-⁴

V = 1.123 × 10⁷m/s

Therefore, the electron is travelling with a velocity of 1.123 × 10⁷m/s if it has a wavelength of 8.20 km.

Learn more about velocity at: brainly.com/question/13171879

#SPJ1

5 0
1 year ago
Other questions:
  • Anne brought a 1 L bottle of vinegar from home to use in an experiment on volcanoes in science class. she poured the contents of
    5·1 answer
  • Write equations for the reaction of 1 mol of Barium Hydroxide with 2 Moles of hydrochloric acid
    15·1 answer
  • What mass of copper is equivalent to 0.7moles?​
    10·1 answer
  • You are following a recipe that calls for 1 egg and 1/3 cup of oil for every cup of flour. In the refrigerator you find only 4 e
    7·1 answer
  • Which of the following is an ionic compound?
    6·2 answers
  • Compare and contrast chemical potential energy and elastic potential energy
    12·1 answer
  • Hello, can someone please help me with this science question I have? because my class starts in 5 mins and I didn't finish it an
    14·1 answer
  • Which of the following BEST explains why fossil fuel supplies are limited?'
    10·1 answer
  • Calculate the number of atoms in a 3.62 × 10³ g sample of strontium. ​
    15·1 answer
  • Given the reaction below, if 0.003 g of carbon dioxide is used up, how many grams of oxygen will be produced? (show work)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!