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
elena-14-01-66 [18.8K]
3 years ago
11

How many molecules are there in 0.75 mol NH3

Chemistry
1 answer:
vitfil [10]3 years ago
4 0
3 *0.75 = 2.25 mol that’s is ur answer for this question
You might be interested in
ethyl chloride, c2h5cl, is used as a local anesthetic. it works by cooling tissue as it vaporizes; its heat of vaporization is 2
Inessa [10]

The amount of heat that could be removed by 20.0 g of ethyl chloride is 8.184 kJ.

<h3>How do we calculate required heat?</h3>

Required amount of heat which can be removed for the vaporization will be calculated as:

Q = (n)(ΔHv), where

  • n = moles of ethyl chloride
  • ΔHv = heat of vaporization = 26.4 kj/mol

Moles will be calculated as:

n = W/M, where

  • W = given mass of ethyl chloride = 20g
  • M = molar mass of ethyl chloride = 64.51 g/mol

n = 20 / 64.51 = 0.31 mol

On putting all these values in the above equation, we get

Q = (0.31)(26.4) = 8.184 kJ

Hence involved amount of heat is 8.184 kJ.

To know more about heat of vaporization, visit the below link:

brainly.com/question/13106213

#SPJ4

6 0
2 years ago
Is there only one atom in an element
Firdavs [7]

Hello


the answer is false becasue the amount of atoms depend on the different elements


hope this helps

plz mark me as brainliest

4 0
3 years ago
Read 2 more answers
You have 363 mL of a 1.25M potassium chloride solution, but you need to make a 0.50M potassium chloride solution. How many milli
maxonik [38]

Answer:- 544.5 mL of water need to be added.

Solution:- It is a dilution problem. The equation used for solving this type of problems is:

M_1V_1=M_2V_2

where, M_1 is initial molarity and  M_2 is the molarity after dilution. Similarly,  V_1 is the volume before dilution and  V_2 is the volume after dilution.

Let's plug in the values in the equation:

1.25M(363mL)=0.50M(V_2)

V_2=\frac{1.25M(363mL)}{0.50M}

V_2=907.5mL

Volume of water added = 907.5mL - 363mL  = 544.5 mL

So, 544.5 mL of water are need to be added to the original solution for dilution.

3 0
3 years ago
Furan and maleimide undergo the Diels-Alder reaction at 25 °C to give the endo product. When the reaction takes place at 90 °C,
mafiozo [28]

Answer:see attached image

Explanation:

In organic chemistry, a product may be kinetically or thermodynamically favoured. A kinetically favours product forms faster, it may not necessarily be the more stable product. The thermodynamically favoured product forms at a slower rate but is more stable. Often times, the kinetically favoured product rearranges itself to form the thermodynamically favoured product at equilibrium. The endo product of the Diels Alder reaction mentioned in the question is first formed (kinetically favoured) but rearranges to form the exo product (thermodynamically favoured) at equilibrium. This is clear shown in the reaction mechanism attached below.

7 0
3 years ago
Are elements, compounds, or both made up of small invisible particles?
son4ous [18]

I think both of them are but I really don't know


6 0
3 years ago
Other questions:
  • The simplest particles of iron are
    5·1 answer
  • Explain how waste heat is inevitable in ecosystems.
    14·2 answers
  • Metals are really good thermal conductors for which of the following reasons? Select all that apply. Metals are really good ther
    8·2 answers
  • Balance the following equations for a redox reaction that takes place in basic solution.
    13·1 answer
  • The shape of which continental coastlines provides evidence for the continental drift hypothesis.
    15·2 answers
  • How does acid rain affect the environment?
    13·1 answer
  • Which factor is least likely to cause a memory problem
    7·1 answer
  • How does increasing the pressure affect the reaction rate? A. The activation energy of the reaction is changed. B. The concentra
    11·1 answer
  • What is the matter of science​
    14·1 answer
  • Why are bacteria necessary for life on Earth to exist? Select three options.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!