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
ElenaW [278]
3 years ago
6

Why is important to only test one variable at a time?

Chemistry
1 answer:
Natalija [7]3 years ago
4 0

Answer:

B

Explanation:

It is important to only test one variable at a time because you need to be able to disprove or prove a problem with just one independent variable. When you have several variables in the experiment, it would be impossible to know which variable honestly caused the end result.

You might be interested in
Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?
wlad13 [49]

if I'm not mistaking it would be the second option

6 0
3 years ago
Which combination of reagents used in the indicated order with benzene will give m-nitropropylbenzene? a. 1) CH3CH2CH2Cl/AlCl3,
VladimirAG [237]

Answer:

1) HNO3/H2SO4, 2) CH3CH2CH2Cl/AlCl3

Explanation:

Benzene is a stable aromatic compound hence it undergoes substitution rather than addition reaction.

When benzene undergoes substitution reaction, the substituent introduced into the ring determines the position of the incoming electrophile.

If I want to synthesize m-nitropropylbenzene, I will first carry out the nitration of benzene using HNO3/H2SO4 since the -nitro group is a meta director. This is now followed by Friedel Craft's alkykation using CH3CH2CH2Cl/AlCl3.

6 0
3 years ago
Nitrobenzene contains 5 hydrogen atoms, 6 carbon atoms, 2 oxygen atoms, and 1 nitrogen atom. what is the chemical formula for ni
ollegr [7]

C₆H₅NO₂

<h3>Further explanation</h3>

Nitrobenzene contains:

  • 5 hydrogen atoms,
  • 6 carbon atoms,
  • 2 oxygen atoms, and
  • 1 nitrogen atom.

The chemical formula for nitrobenzene is C₆H₅NO₂.

Nitrobenzene is one of benzene derivatives, precisely including the type of monosubstituted benzenes.

The molecular structure of phenyl  \boxed{ \ C_6H_5- \ } is formed by removing one H atom from the benzene \boxed{ \ C_6H_6 \ } molecule. A substituent is bound to the C atom which loses the H atom so it is called monosubstituted benzene.

In the naming of monosubstituted benzenes, benzene is the parent name and the substituent is indicated by a prefix.

  • nitro is the substituent
  • benzene is the parent name

When benzene is reacted with a mixture of concentrated nitric acid and concentrated sulfuric acid, it yields nitrobenzene.

\boxed{ \ C_6H_6 + HNO_2 \ (with \ H_2SO_4 \ in \ 30^0C-40^0C) \rightarrow C_6H_5NO_2 + H_2O}

- - - - - - -

<u>Notes:</u>

  • Benzene and compounds having similar chemical properties to benzene are called aromatic compounds.
  • Benzene is a colorless, poisonous liquid with a specific odor. it dissolves in organic solvents in organic solvents such as alcohol, ether, and acetic acid. Benzene is also good for non-polar substances.
  • Nitrobenzene is used in the manufacture of aniline and other organic chemicals. Nitrobenzene is a pale yellow, oily, and highly toxic liquid with the odor of bitter almonds.
<h3>Learn more</h3>
  1. Calculating the pH value of weak base brainly.com/question/9040743
  2. About the solution as a homogeneous mixture  brainly.com/question/637791
  3. About the mass and density of substances  brainly.com/question/4053884

Keywords: nitrobenzene, contains, 5 hydrogen atoms, 6 carbon, 2 oxygen, and 1 nitrogen. the chemical formula, benzene, monosaturated, phenyl, aromatic compounds

7 0
3 years ago
Read 2 more answers
What is the name of this ion :Cu++​
kicyunya [14]

The name of the ion is Copper.

<u>Explanation</u>:

  • Copper is a chemical element symbolized as Cu. It has different ions, one of which is Cu(2+) and Cu(1+).
  • Copper on losing 2 electrons forms the ion Cu(2+)
  • Copper(2+) is an ion that carries double positive charge.
  • It plays the role of a cofactor.
  • It is also more stable than the single positive ion Cu(1+)
5 0
4 years ago
Read 2 more answers
What is the pH of a solution of 0.900 M KH2PO4, potassium dihydrogen phosphate? Express your answer numerically to the hundredth
stepan [7]
4.67 is the right answer

+ − − log(7,5 ∗ 10−3) − log(6.2 ∗ 10−8) ,34 ,24
= 2 = 2 =4.67
3 0
3 years ago
Other questions:
  • I need help I don’t get this
    8·1 answer
  • The two pieces of chlothing have charges and they each other and Electrons move from the wool to
    15·1 answer
  • Which is a property of covalent compounds?
    13·1 answer
  • What happens when the compound NaCl is formed?
    7·2 answers
  • How many moles of \ce{AgCl}AgClA, g, C, l will be produced from 60.0 \text{ g}60.0 g60, point, 0, start text, space, g, end text
    10·1 answer
  • In a reaction equation, where are the products located?
    14·2 answers
  • Example of chemical change?
    8·1 answer
  • When heat is applied to 80 grams of CaCO3, it yields 39 grams of B. Determine the percentage of the yield.
    5·1 answer
  • Urgent!!
    15·1 answer
  • PLEASE HELP ME ASAP AND DONT GUESSSS!!!!!!!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!