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
kicyunya [14]
3 years ago
13

Plz help me in this Question (i) and (ii) and (iii)

Chemistry
1 answer:
gregori [183]3 years ago
7 0

The answer is given below....

Hope it helps

You might be interested in
The chemical reaction in which two molecules combine to form a larger molecule, and water is released is called
Semmy [17]

Answer: condenstation.


Justification:


The polymerization by condensation is a well know chemical reaction in which two monomers ("small" molecules), each with (at least) two functional groups, combine and relase water as by-product. Actually, even if the by-product released is not water, yet the reaction is called condenstation, since the mechanism is basically the same.


An example of such reaction is the manufacturing of nylon 6,6, which is produced from adipic acid and 1,6-diamine hexane:


HOOC - [CH₂]₄ - COOH + nH₂N - [CH₂]₆ - NH₂ → - nylon - + nH₂O


I omitted the formula of nylon because it is large, and that is not the core of the question but the fact the kind of reaction: two molecules combine to form is a larger molecule, and water is released

7 0
2 years ago
Read 2 more answers
2. List and elaborate on at least two limitations of the 24-hour recall as a
Pavlova-9 [17]

Answer:

The correct answer is - may not be typical, and participant burden.

Explanation:

The 24-hour recall is nothing but a retrospective method of diet assessment. In this method, an individual is interviewed about his or her diet consumption during the last 24 hours.

The disadvantages or limitations of this method include the inability of a single day's intake to describe the typical diet, multiple recalls to intake, cost and administration time; participant burden, have to recall to reliably estimate usual intake.

5 0
3 years ago
Which of the following chemicals effects blood pressure for both the short and long term?
andriy [413]
The chemical that effects blood pressure for both the short and long term is Angiotensin II

8 0
2 years ago
15.0 mL of an unknown clear liquid is added to a 50 mL graduated cylinder. The mass of the liquid is determined to be 12.7 grams
sveticcg [70]

Answer:

\boxed {\tt A. \ d=0.85 \ g/mL}

Explanation:

Density is found by dividing the mass by the volume.

d=\frac{m}{v}

The mass of the liquid is 12.7 grams.

We know that 15 mL of this liquid was added to a 50 mL graduated cylinder. Therefore, the volume is 15 mL. The 50 mL is not relevant, it only tells us about the graduated cylinder.

m= 12.7 \ g\\v= 15 \ mL

Substitute the values into the formula.

d=\frac{12.7 \ g}{ 15 mL}

Divide.

d=0.846666667 \ g/mL

Round to the nearest hundredth. The 6 in the tenth place tells us to round the 4 to a 5.

d \approx 0.85 \ g/mL

The density of the liquid is about 0.85 grams per milliliter and choice A is correct.

4 0
2 years ago
50 points plz help
EleoNora [17]

Answer: b

Explanation:

7 0
3 years ago
Other questions:
  • Students rolled a glass marble and a baseball down an inclined plane, as shown below, and made observations.
    11·2 answers
  • You get a can of soda from the vending machine and your “friend” maliciously shakes it when you’re not looking. You open the can
    6·2 answers
  • C(s) + S8(s) → CS2(l)
    15·1 answer
  • How have new technologies made it easier for scientists around the world to share ideas with each other?
    10·1 answer
  • I need help answering 14 and 15
    13·1 answer
  • What type of bond does hafnium oxide have?<br> A. ionic <br> B. covalent <br> C. Metallic
    5·1 answer
  • 60 points one of the questions im stuck on
    14·2 answers
  • When a person walks into the water, it appears that their feet are separated 1 point
    13·2 answers
  • The human body produces 1.4 liters of urine daily. The kidneys produce the urine by filtering
    12·1 answer
  • Air is about 78% nitrogen gas (N2) by mass. The molar mass of nitrogen gas is 28. 0 g/mol. A 100. 0-g sample of air contains how
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!