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expeople1 [14]
3 years ago
9

The PH of a solution of Hcl is 2.find out the amount of acid present in a litre of the solution ​

Chemistry
1 answer:
Scrat [10]3 years ago
5 0

Answer:

The solution is 10^-2 or 0.01M in HCl.

Explanation:

meaning of pH is "power of hydrogen".

what is the molar concentration of a HCl solution with pH=2?

Let say pH=2

[H+]=10^-2M

HCL is a strong acid that dissociates completely:

[H+]=[HCL]

Therefore solution is 10^-2 or 0.01M in HCL.

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How efficient are electric engines
raketka [301]

Answer:

Electric engines have efficiencies of roughly 90% whilst combustion engines about 10% to 30%. This is because combustion engines emit much more heat, which is always energy that is not used as work, and thus increases inefficiency.

Explanation:

3 0
3 years ago
a magnet has a north and south pole labeled in the drawing student A thinks that if you cut a magnet in half each ew parts will
riadik2000 [5.3K]

Answer:

The student is Incorrect

Explanation:

Even if you break a magnet the poles still remains same. There is no

difference in the magnet Both north  and south pole will be there even if you

cut it in to small pieces when you cut it into pieces, if suppose you  break 2

magnets and put north and north together it will repel whereas if there  are  

different  poles like north and south it will attract, so even if you break one

single magnet the different poles will attract, Hence the student is incorrect.

Please mark me as brainliest

<h3><u>Thank you </u>:)</h3>

8 0
2 years ago
Somebody please help me!!
mariarad [96]

Answer:

The given isotope is Br 80

If 35 protons present then its atomic number is 35

Mass number is 80 so its meutrons are 45 because proton+ neutron = mass number

Its electron are 36 because of negative one charge

Explanation:

4 0
3 years ago
The elements X and Y combine in different ratios to form four different types of compounds: XY, XY2, XY3, and XY4. Consider that
Law Incorporation [45]

Answer:

Ratios in order of increasing value ; The ratio of the mass ratio of Y to X in XY2 to the mass ratio of Y to X in XY, The ratio of the mass ratio of Y to X in XY3 to the mass ratio of Y to X in XY, The ratio of the mass ratio of Y to X in XY4 to the mass ratio of Y to X in XY

1) Mass ratio = 3

2) Mass ratio = 2

3) Mass ratio = 4

Explanation:

The detailed and step by step calculation is shown in the attachment.

3 0
3 years ago
What is the rate of acceleration of a 2,000-kilogram truck if a force of 4,200n is used to make it start moving forward?
butalik [34]

Answer:

The answer to your question is:      a = 2.1 m/s²

Explanation:

Data

Acceleration : ?

Mass = 2000 kg

Force = 4200 N

Formula

Newton's second law of motion    F = ma

                                                        a = F / m

Substitution

                                     a = 4200 N / 2000 kg

                                      a = 2.1 m/s²

                                                     

7 0
3 years ago
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