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
Leto [7]
2 years ago
7

hỗn hợp E gồm 6 este có cùng CTPT C8H8O2 và đều chứa vòng benzen. Cho 68g phản ứng tối đa với V ml dd NaOH 1M đun nống, thu được

15g muối và 77,4g hh ancol Y. Giá trị của V là?
Chemistry
1 answer:
Lubov Fominskaja [6]2 years ago
7 0

Explanation:

just a few days ago and I have a

You might be interested in
An ideal gas cannot be _____. <br> a. heated <br> b. condensed <br> c. compressed <br> d. cooled
mamaluj [8]
An ideal gas cannot be Condensed 
4 0
3 years ago
Read 2 more answers
You are given a 2.9237 g sample of a substance with the generic formula MCl2(H2O)6. After completely drying the sample (which me
Katyanochek1 [597]

Answer:

M is cobalt (Co)

Explanation:

Step 1: Data given

Mass of MCl2(H2O)6 = 2.9237 grams

After completely drying the sample (which means removing the 6 moles of H2O per mole of MCl2), the sample weighs 1.5941 g.

Step 2: Calculate mass of water

Mass of water = 2.9237 - 1.5941  = 1.3296 grams

Step 3: Calculate moles water

Moles water = mass water / molar mass water

Moles water = 1.3296 grams / 18.02 g/mol

Moles water = 0.07378 moles

Step 4: Calculate moles of the whole substance

For 1 mol MCl2(H2O)6 we have 6 moles H2O

Number of moles of the whole substance = 0.07378 / 6 = 0.01230 moles

Step 5: Calculate molar weight of the substance

Molar weight = mass / moles

Molar weight = 1.5941 grams / 0.01230 moles

Molar weight = 129.6 g/mol

Step 6: Calculate molar weight of M

Molecular weight of M = 129.6 - (2*35.45)

Molecular weight of M = 58.7 g/mol

M is cobalt (Co)

4 0
3 years ago
Freon-12 CCl2F2, is prepared from CCl4 by reaction with HF. The other product of this reaction is HCl. Outline the steps needed
LekaFEV [45]

Answer:

percent yield = 40.6 %

Explanation:

The question asks to determine the percent yield, which can be defined as:

percent yield = \frac{actual yield}{theoretical yield} *100

where the actual yield is how much product was obtained, in this case 12.5 g of CCl₂F₂, and the theoretical yield is how much product could be obtained with the given reactants theoretically.

So we know already the actual yield, we need to <em>calculate the theoretical yield.</em>

First we need to <em>write the reaction chemical equation</em>:

CCl₄ + HF → CCl₂F₂ + HCl

and <em>balance the equation</em>:

CCl₄ + 2 HF → CCl₂F₂ + 2 HCl

In the equation we can see that <em>for every mol of CCl₄ we should get 1 mol of CCl₂F₂</em> (molar ratio 1:1). So if we <u>calculate the moles of CCl₄</u> in the given 39.2 g of CCl₄ we could know how many moles of CCl₂F₂ (assuming HF is in excess).

  • Moles of CCl₄ = mass CCl₄ / molar mass CCl₄
  • Molar Mass CCl₄ = 12.011 + 4 * 35.45 = 153.811 g/mol
  • Moles of CCl₄ = 39.2 g / 153.811 g/mol = 0.2549 moles

From the molar ratio we know:

Moles of CCl₂F₂ = moles of CCl₄ = 0.2549 moles

Now we need to <u>convert these moles into grams</u> to get the theoretical yield of CCl₂F₂ in grams:

  • mass CCl₂F₂ = moles CCl₂F₂ * molar mass CCl₂F₂
  • Molar Mass CCl₂F₂ = 12.011 + 2 * 35.45 + 2 * 18.998 = 120.907 g/mol
  • Mass CCl₂F₂ = 0.2549 moles * 120.907 g/mol = 30.81 g
  • Theoretical yield CCl₂F₂ = 30.81 g

Percent yield = (12.5 g / 30.81 g) * 100 = 40.6 %

8 0
3 years ago
For the reaction represented by the equation 2h+O2– 2H2O, how may grams of water are produced from 6.00 mol of hydrogen?
Pepsi [2]

Answer:

Mass = 108 g

Explanation:

Given data:

Mass of water produced = ?

Number of moles of hydrogen = 6.00 mol

Solution:

Chemical equation:

2H₂ + O₂     →     2H₂O

Now we will compare the moles of hydrogen with water.

                H₂             :              H₂O

                  2             :               2

                  6             :             6

Mass of water:

Mass = number of moles × molar mass

Mass = 6 mol × 18 g/mol

Mass = 108 g

3 0
2 years ago
Define Physical and Chemical change
vlada-n [284]

Answer:

Explanation:

Chemical is when there is a change of color odor or temperature rises

7 0
2 years ago
Other questions:
  • How quick does it take for hearts to beat
    10·1 answer
  • Be sure to answer all parts.Classify each nitrogen-containing functional group in the anesthetic lidocaine according to whether
    10·1 answer
  • If you know the answer I could really use some help rn!
    9·1 answer
  • Look at the following reaction. How could you increase the production of 2NH3(g)? N2(g) + 3H2(g) 2NH3(g) Increase the volume of
    7·2 answers
  • What happens to the air temperature of a decending mass of air
    10·1 answer
  • How does a change in thermal energy affect the liquid in a thermometer?
    6·1 answer
  • How does increasing and decreasing the temperature affect the kinetic energy of molecules? How does this impact heat
    7·1 answer
  • What are things that cause change
    6·2 answers
  • What is an Atom in ​
    6·1 answer
  • Which is not a form of potential energy?<br><br> gravitational<br> chemical<br> elastic<br> thermal
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!