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
Stolb23 [73]
2 years ago
12

Amino axit X có công thức H2NCxHy(COOH)2. Cho 0,1 mol X vào 0,2 lít dung dịch H2SO4 0,5M, thu được dung dịch Y. Cho Y phản ứng v

ừa đủ với dung dịch gồm NaOH 1M và KOH 3M, thu được dung dịch chứa 36,7 gam muối. Phần trăm khối lượng của nitơ trong X là
Chemistry
1 answer:
Taya2010 [7]2 years ago
7 0

Answer:

nH2SO4 = 0,1 mol

Đặt nNaOH = a; nKOH = 3a (mol)

Quy đổi phản ứng thành: {X, H2SO4} + {NaOH, KOH} → Muối + H2O

Ta có: nH+ = nOH- → 2nX + 2nH2SO4 = nNaOH + nKOH

→ 2.0,1 + 2.0,1 = a + 3a → a = 0,1

→ nH2O = nH+ = nOH- = 0,4 mol

BTKL: mX + mH2SO4 + mNaOH + mKOH = m muối + mH2O

→ mX + 0,1.98 + 0,1.40 + 0,3.56 = 36,7 + 0,4.18 → mX = 13,3 gam

→ MX = 13,3/0,1 = 133

→ %mN = (14/133).100% ≈ 10,526%

You might be interested in
How was president Andrew Jackson wrong for closing the bank
Paladinen [302]
Jackson, the epitome of the frontiersman, resented the bank's lack of funding for expansion into the unsettled Western territories. Jackson also objected to the bank's unusual political and economic power and to the lack of congressional oversight over its business dealings.
5 0
2 years ago
Energy can be changed from potential to kinetic.<br> A.True<br> B.False
vampirchik [111]

Answer:

An object has potential energy (stored energy) when it is not in motion. Once a force has been applied or it begins to move the potential energy changes to kinetic energy (energy of motion).

Therefore, true. (Also would u mind giving brainliest, you don't have to hehe)

6 0
3 years ago
What are two ways condensation differs from boiling?
NARA [144]
Condensation is when vapor liquidizes and gathers on top of a surface, while boiling is turning a liquid into a gas or vapor. They are opposites. In the first, the molecules of the substance split and separate and increase the volume, while in the second they come together and reduce the volume.
6 0
3 years ago
If earth did not rotate what would happen to the hlobal wind
Readme [11.4K]
It would probably stop moving. Earth has motion and we do do. without the world moving, there would be No wind at all.
8 0
3 years ago
What is Tiny grains that contain sperm call
astra-53 [7]

Answer:

Pollen

Explanation:

Pollen is a powdery substance consisting of pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells).

6 0
3 years ago
Other questions:
  • Why do we use anhydrous diethyl ether? Choose the right answer.
    11·1 answer
  • Three products of destructive distillation of coal <br>please answer quickly ​
    5·2 answers
  • A gas that exerts a pressure of 537 torr in a container with a volume of 5.30 L will exert a pressure of 255 torr when transferr
    14·1 answer
  • What is the percent composition of carbon in caffeine (C₈H₁₀N₄O₂)?
    6·1 answer
  • I need the answer for the first question 1.
    6·1 answer
  • What is the answer to 2.5 * 22.5
    11·1 answer
  • Which product is the final outcome of a nuclear generating plant? uranium heat electricity steam
    10·1 answer
  • Which product forms from the synthesis reaction between strontium (Sr) and sulfur (S)? O A. Sres O B. Srs O C. SS2 O D. Sr S2​
    7·2 answers
  • HELP ME! IM SO DESPERATE I WILL GIVE YOU BRANLIEST!!!!!!!!!!!!!!!!
    8·1 answer
  • A solution has a pH of 2. Which best describes the solution? A strong acid, a strong base, a neutral solution, a weak base
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!