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
lapo4ka [179]
3 years ago
8

You measure out 1.8 mL of an aqueous ethylenediamine (H2NCH2CH2NH2) solution. This aqueous solution has a density of 0.950 g/mL

and is 25.0% by mass ethylenediamine. How many moles of ethylenediamine are in the 1.8 mL?
Chemistry
1 answer:
Simora [160]3 years ago
7 0

Answer:

7.11x10⁻³ moles ethylenediamine

Explanation:

To find the answer we need to convert the volume to mass using density, the mass to mass of ethylenediamine using the concentration of the solu and to moles using its molar mass (Molar mass ethylendiamine: 60.1g/mol):

<em>Mass:</em>

1.8mL * (0.950g/mL) = 1.71g

<em>Mass ethylenediamine:</em>

1.71g * 25.0% = 0.4275g ethylenediamine.

<em>Moles:</em>

0.4275g * (1mol / 60.1g) =

<h3>7.11x10⁻³ moles ethylenediamine</h3>
You might be interested in
What process at the surface of the Earth is part of the formation of sedimentary rocks?
OLga [1]

Answer:

Clastic sedimentary rocks are made up of pieces (clasts) of pre-existing rocks. Pieces of rock are loosened by weathering, then transported to some basin or depression where sediment is trapped. If the sediment is buried deeply, it becomes compacted and cemented, forming sedimentary rock.

please give brainliest

3 0
3 years ago
Given that E°red = -0.40 V for Cd2+/Cd at 25°C, find E° and E for the concentration cell expressed using shorthand notation belo
tensa zangetsu [6.8K]

From the information in the question, the  E° and E for the cell is 0.00 V and 0.12 V.

Using the Nernst equation;

Ecell =  E°cell - 0.0592/n log Q

We know that  E°cell = 0.00 V since the anode and cathode are both made up of cadmium.

Substituting the given values into the Nernst equation;

Ecell = 0.00 V - 0.0592/2 log (1.0 × 10-5 M/0.100 M)

Ecell =  0.00 V - 0.0296 log(1 × 10^-4)

Ecell = 0.12 V

Learn more: brainly.com/question/8646601

3 0
3 years ago
What do you understand by Project of National Pride<br>​
LuckyWell [14K]

Answer:

National Pride Projects are a set of infrastructure projects by the government of Nepal based on the proposal by the National Planning Commission.

6 0
4 years ago
1 Copy and complete using the words below:
Aleks [24]

Answer:

The elements in__Group_ 0 of the Periodic Table are called the_noble__gases. They are generally __unreactive_. because they have a__full_outer shell of electrons. So they do not need to gain__lose_or share _electrons_ with other atoms.

5 0
4 years ago
HURRY ⚠️<br> How many Chlorine atoms in 2HCI?<br> Hiw many Hydrogen atoms are in 2HCl?
slega [8]

Answer:

2 in each

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • why do all of these elements- hydrogen, helium, lithium, and beryllium all have negative charges? explain
    5·1 answer
  • If an atom has a mass number of 16 and atomic number of 8, how many protons, neutrons, and electrons does the atom have
    5·1 answer
  • An order is given to administer methylprednisolone, an anti-inflammatory drug, by IV at a rate of 39 mg every 30 min. The IV bag
    8·1 answer
  • A sample consisting of various gases contains 3.2×10−6 mole fraction of radon. This gas at a total pressure of 34 atm is shaken
    11·1 answer
  • 1 dozen apples=2.0kg whats the mass of 7 red apples
    6·1 answer
  • The position of the equilibrium for a system where k = 4.6 × 10-15 can be described as being favored to ________; the concentrat
    12·1 answer
  • Go to the Phase Changes tab. Select the particular molecule, and set the temperature to the given values by using the stove to i
    9·1 answer
  • vIt is the middle of winter when you go to the store to buy some balloons for a birthday party. After you get to your car with t
    13·2 answers
  • Calculate the speed of the car at each checkpoint by dividing the distance between each checkpoint in meters by the change in ti
    15·2 answers
  • Will give brainliest and 20 points if you help!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!