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Eva8 [605]
3 years ago
7

What the correct answer?

Chemistry
1 answer:
alexandr402 [8]3 years ago
3 0

B. Bleach and sea water should be identified as bases

Explanation:

  • The pH scale measures the acidic or basic nature of a substance.
  • Ranges from 0 to 14.
  • If pH is lower than 7 → the solution is an acid.
  • If pH is more than 7 → the solution is an basic or alkaline.
  • If a pH is a 7 it is neutral.

In the given question, the pH scale measures for bleach is 8 and for sea water it is 13. So, bleach is basic, not neutral and Sea water is basic too instead of acid. So, Bleach and sea water should be identified as bases.

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What is the density of a substance that has a mass of 453g and a volume of 224mL?
Savatey [412]
453 divided by 224
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7 0
4 years ago
When a strontium atom loses two electrons to form an Sr2+ ion, the electrons are lost from the
kherson [118]

Answer:When a strontium atom loses two electrons, it becomes a(n) cation with a charge of 2+. when any neutral atom loses an electron it becomes cation that is positively charged ions and an ion gets the charge according to the number of electrons loses.

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6 0
3 years ago
The Haber process generates ammonia from nitrogen and
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Given the 1H and 13C data below, which isomers of C8H11N fit the spectral data? 13C NMR: δ 17.2, 20.4, 115.1, 122.4, 137.3, 127.
iogann1982 [59]

Complete Question

The complete question is shown on the first , second , third and fourth

Answer:

The compound that fit the spectra data are compound B, E and H as shown in the question

Explanation:

From the question we are given that the 13C NMR data is  

          13C NMR: 17.2,20.4,115.1,122.4,137.3,127.6,131.1,142.1 pmm

From the spectral diagram on the question we can see that the signal at 17.2 ppm and 20.4 ppm indicates the presence of two different sp^{3} carbon atoms.

Also the signals at 115.1 , 122.4 , 137.3, 127.6,131.1,142.1 ppm indicates the molecule with six different sp^{2} carbon atoms.

Thus , the compound with two different sp^{3}  carbon atoms and six different sp^{2} carbon atoms are shown on the third uploaded image

Now let us take a look at the 1H NMR as follows

For NMR spectra the integration values are in the ration 1.99:1.00:2.19: 5.93

Now we can look at this above ratio like this 2:1:2:6 by reduction

Hence the relative number of proton is in the ratio of 2H: 1H: 2H: 6H

2H at 6-7 ppm and 1H at 6-7 ppm are due to the presence of three aromatic proton which are present on the benzene ring.

2H at 3.5 ppm are due to proton in amino group NH_{2} protons.

6H gives two signals at 2.2 ppm due to the presence of the two CH_{3}  protons

The compound A is not matched with 1 H  NMR spectra, thus remove the compound A .The other compounds are B,E,F

Thus ,the compound with the proton in the ratio 2H : 1H :2H : 6H are shown on the fourth uploaded image

Hence the compounds with the given NMR spectra are B,E and H

 

4 0
3 years ago
One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
Vera_Pavlovna [14]
The human body<span> contains </span>many<span> salts, of which </span>sodium<span> chloride NaCl is the major one, making up around 0.4 per cent of the </span>body's<span> weight. So a 50kg</span>person<span> would contain around 200g of </span>sodium<span> chloride - around 40 teaspoons. Since we lose </span>salt<span> whenever we sweat, it has to be continually replaced. Answer: C.</span>
8 0
3 years ago
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