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
IgorLugansk [536]
3 years ago
10

Một hỗn hợp X gồm CH3OH; C2H5OH; phenol có khối lượng 28,9 gam phản ứng vừa hết với 100ml dung dịch NaOH 2M. Phần trăm theo khối

lượng phenol là ? Biết C = 12; O = 16; H = 1; Na = 23. *
Chemistry
1 answer:
slavikrds [6]3 years ago
3 0

Answer:

nNaOH = 0,2 mol

Trong hỗn hợp các chất đề bài cho chỉ có phenol tác dụng với NaOH

C6H5OH + NaOH → C6H5ONa + H2O

   0,2  ←     0,2 (mol)

⟹ mphenol = 0,2.94 = 18,8 gam

⟹  

%mC6H5OH=18,8/28,9 x100%= 65,05%

Explanation:

You might be interested in
2 A certain gas of 25 g at 25°c and 0.65 atm occupies a volume of 23.52L Determine the molecule mass of the gas.​
denpristay [2]

Answer:

{ \bf{PV= \frac{m}{M} RT}} \\  \\ { \tt{(0.65  \times 23.52)  =  \frac{25}{M}  \times 0.081 \times (25 + 273)}} \\  \\ M = 39.5 \: g

8 0
3 years ago
Which boiling point is lower an why?
DiKsa [7]

Answer:4

Explanation:

If we carefully observe the electronegativity of the elements in question

P-2.19

N-3.04

C-2.55

Si-1.9

H-2.2

SiH4 is definitely more polar than CH4 hence greater dipole forces of a higher boiling point. NH3 is more polar than PH3 hence NH3 has greater dipole forces and a higher boiling point. Electronegative differences influences the polarity of a bond. The greater the electro negativity difference between bonding atoms, the greater the dipole forces and the greater the boiling point.

3 0
3 years ago
Read 2 more answers
Which electrons participate in chemical bonding?
OverLord2011 [107]
B.) Valence Electrons. The nucleus of the valence electrons attracts and pulls atoms together.
7 0
3 years ago
Read 2 more answers
Mass, size, and color are examples of what?
Igoryamba
Physical properties of matter
3 0
3 years ago
How equation can show physical states and reaction conditions
GarryVolchara [31]

Answer:

Explanation:

In a chemical equation, the reactants are written on the left, and the products are written on the right. Chemical equations should contain information about the state properties of products and reactants, whether aqueous (dissolved in water — aq), solid (s), liquid (l), or gas (g). hope that helped

7 0
3 years ago
Read 2 more answers
Other questions:
  • ANSWER ASAP WILL GIFT BRANILIEST Which of the following happens to a molecule of an object when the object is cooled? A Its temp
    9·2 answers
  • What is the value for the potential energyfor a n = 6 Bohr orbit electron in Joules?
    10·1 answer
  • Consider the redox reaction below.
    13·1 answer
  • The metallic radius of a potassium atom is 231 pm. What is the volume of a potassium atom in cubic meters?
    13·1 answer
  • A 50.0-gram block of copper at 10.0°C is carefully lowered into 100.0 grams of water at 90.0°C in an insulated container. Which
    6·1 answer
  • Enolase, an enzyme that catalyzes the conversion of 2-phosphoglycerate to phosphoenolpyruvate: Group of answer choices demonstra
    5·1 answer
  • Which substance is a type of biomolecule that can be used for energy storage and insulation? O A. Nucleic acid O B. Carbon dioxi
    15·2 answers
  • What product is obtained from the reaction of sulfuric acid acetic acid and 1 pentanol.
    9·1 answer
  • QUESTION 1
    14·1 answer
  • During a reaction, the enthalpy of formation of an intermediate is 34 kJ/mol.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!