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
aleksandrvk [35]
3 years ago
15

Which of the following best explains why you sanded the copper wire before burning it? to create less friction between the coppe

r and the tongs to make sure that copper metal was exposed on the surface of the wire to make the copper wire flammable to weaken the copper wire so it would be more reactive
Chemistry
1 answer:
artcher [175]3 years ago
8 0

The copper wire was sanded before burning in order to make sure that copper metal was exposed on the surface of the wire.

Answer: B

Explanation

The copper wire when placed in atmosphere without coating leads to oxidation of copper metal with respect to the impurities present in the atmosphere.

As copper is electropositive in nature, so electronegative ions present in the universe will try to react with copper and the copper will react easily with other elements.

So generally copper wire is coated with color or polymer coating.

In this case, the copper wire without any coating is sanded, so that the eddy sheets or polishing materials on friction with copper wire will remove the impurities by the electrostatic law of conservation of charges and charge transfer.

As the impurities are removed when copper wire is sanded, the copper atoms will be exposed on the surface of the wire leading to burning of copper in the copper wire.

You might be interested in
Flammability is a material’s ability to burn in the presence of
frosja888 [35]

Answer:

Flammability is a material’s ability to burn in the presence of <u><em>oxygen.</em></u>

Explanation:

Flammability can be described as the ability of a substance to get ignited. Flammability will lead to fire or combustion. Some substances are highly flammable like Benzene. Other tend to be just flammable. And there are also compounds which will nor be flammable at all as they won't react with oxygen. Examples of these substances include helium, steel or glass.

The flammability of a substance shall be considered a very important aspect when storing or transporting a substance.

5 0
2 years ago
If 12.1 kilograms of al2o3(s), 60.4 kilograms of naoh(l), and 60.4 kilograms of hf(g) react completely, how many kilograms of cr
Fynjy0 [20]
Answer is: 7,826 kg of cryolite.
Chemical reaction: Al₂O₃ + 6NaOH + 12HF → 2Na₃AlF₆ + 9H₂<span>O.
m(</span>Al₂O₃) = 12,1 kg = 12100 g.
n(Al₂O₃) = m(Al₂O₃) ÷ M(Al₂O₃).
n(Al₂O₃) = 12100 g ÷ 101,96 g/mol = 111,86 mol; limiting reactant.
m(NaOH) = 60,4 kg = 60400 g.
n(NaOH) = 60400 g ÷ 40 g/mol.
n(NaOH) = 1510 mol.
m(HF) = 60,4 kg = 60400 g.
n(HF) = 60400 g ÷ 20 g/mol = 3020 mol.
From chemical reaction: n(Al₂O₃) : n(Na₃AlF₆) = 6 : 2.
n(Na₃AlF₆) = 2 ·111,86 mol ÷ 6 = 37,28 mol.
m(Na₃AlF₆) = 37,28 mol · 209,94 g/mol.
m(Na₃AlF₆) = 7826,56 g = 7,826 kg.
7 0
3 years ago
Most cars use water to cool their engines. Ethylene glycol, propylene glycol, or methanol may be added to the water, especially
NemiM [27]

Answer:

B

Explanation:

8 0
3 years ago
A sucrose packet contains 4.0g sucrose C12H22O11, how many moles of sucrose does the packet contain?
SpyIntel [72]

Answer:

And we have to calculate the number of moles of sucrose present in a lb mass of sucrose: Moles of sucrose=454⋅g342.30⋅g⋅mol−1=1.33⋅mol .

Explanation:

<u>Brainliest</u><u> </u><u>Answer </u><u>Pls</u>

8 0
2 years ago
Which of the following environmental risks is most likely to lead to digestive health issues?
xz_007 [3.2K]
You haven’t listed answer choices for this question
5 0
3 years ago
Read 2 more answers
Other questions:
  • When air bags inflate, nitrogen gas is formed from sodium azide, along with solid sodium. what reaction category is this?
    7·1 answer
  • The mass of the atom is found by adding is protons and neutrons the electrical charge of an atom is found by adding the charge i
    13·1 answer
  • Whenever anything moves, it has _____ energy. <br><br> chemical <br> heat <br> mechanical
    14·1 answer
  • Draw a Lewis structure and indicate the hybridization for each molecule that contains more than one interior atom. Draw the Lewi
    10·1 answer
  • 5.1 ounces to<br> grams.
    13·2 answers
  • How many electron pairs are shared between carbon atoms in a molecule that has the formula c 2h 4?
    13·1 answer
  • Convert 27.7 kilometers to centimeters.
    7·1 answer
  • How many grams of water will I obtain from the combustion of 0.9249 mol of pentane (C5H12) in the following reaction?
    8·2 answers
  • How do heat and temperature differ?
    13·1 answer
  • Explain the trend as you move across a row of the periodic table for each of the following atomic
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!