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Nesterboy [21]
3 years ago
5

In which of the following are the pH values arranged from the most basic to the most acidic?

Chemistry
1 answer:
MAVERICK [17]3 years ago
8 0

Answer:

The correct answer is : 14, 10, 7, 4, 3, 1

Explanation:

The pH of the solution is a negative logarithm of the hydronium ion's concentrations present in a aqueous solution.The pH scale ranges from 0 to 14.

Mathematically written as:

pH=-\log[H_3O^+]

  • Higher the value of pH more alkaline will be the solution.
  • Lower the value of pH more acidic will be the solution.
  • The solution with pH value 7 is termed as neutral solution.

So, from the given options of pH arranged from most basic to most acidic will be the decreasing order from 14 to 1 :

14, 10, 7, 4, 3, 1

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A container of oxygen with a volume of 60 L is heated from 300 K to 400 k, What is the new volume?
Lunna [17]

Answer:

80L

Explanation:

V1/T1 = V2/T2

V2 = V1 T2/T1

T1 = 300K

V1 = 60L

T2 = 400K

V2 = ?

V2 = V1 T2/T1

V2 = (60L)(400K) / (300K)

V2 = 80L

7 0
2 years ago
What starts a convection current in the mantle?
julsineya [31]

Heat in the mantle comes from the Earth's molten outer core, decay of radioactive elements and, in the upper mantle, friction from descending tectonic plates.The temperature difference between the upper and lower boundaries of the mantle requires heat transfer to occur.

Material heating up in the mantle

6 0
2 years ago
What does this mean: A saturated solution may be quite dilute because some substances have a very low solubility. I don't unders
atroni [7]

Answer:

Here's how I would explain it.

Explanation:

Think of it this way.

When you mix solutions of silver nitrate and sodium chloride, you get an immediate precipitate of silver chloride. The equation is

Ag⁺(aq) + Cl⁻(aq) ⟶ AgCl(s)

Now, take some AgCl and stir it vigorously with water.

You won't see much happening, because the AgCl is has such a low solubility. Not much of it will go into solution. And yet, a small amount of it does dissolve until the solution is saturated.

The concentration of AgCl in the saturated solution is

about 0.000 01 mol·L⁻¹.

I hope you will agree that this is a dilute solution even though it is saturated with AgCl.

8 0
3 years ago
Two elements next to each other that have decreasing atomic masses
pogonyaev

Answer:

  • <u>Tellurium (Te) and iodine (I) are two elements </u><em><u>next to each other that have decreasing atomic masses.</u></em>

Explanation:

The <em>atomic mass</em> of tellurium (Te) is 127.60 g/mol and the atomic mass of iodine (I) is 126.904 g/mol; so, in spite of iodine being to the right of tellurium in the periodic table (because the atomic number of iodine is bigger than the atomic number of tellurium), the atomic mass of iodine is less than the atomic mass of tellurium.

The elements are arranged in increasing order of atomic number in the periodic table.

The atomic number is equal to the number of protons and the mass number is the sum of the protons and neutrons.

The mass number, except for the mass defect, represents the atomic mass of a particular isotope. But the atomic mass of an element is the weighted average of the atomic masses of the different natural isotopes of the element.

Normally, as the atomic number increases, you find that the atomic mass increases, so most of the elements in the periodic table, which as said are arranged in icreasing atomic number order, match with increasing atomic masses. But the relative isotope abundaces of the elements can change that.

It is the case that the most common isotopes of tellurium have atomic masses 128 amu and 130 amu, whilst most common isotopes of iodine have an atomic mass 127 amu. As result, tellurium has an average atomic mass of 127.60 g/mol  whilst iodine has an average atomic mass of 126.904 g/mol.

5 0
3 years ago
How does a phenol red-containing solution look if co2 level is low?
vampirchik [111]

Answer:

The variables to be examined in relation to carbon dioxide use are the amount of light exposure and amount of dissolved CO2. Phenol red is yellow/orange under acidic conditions, that is when the pH of the solution is less than 7 (e.g. pH = 6). This occurs when the concentration of CO2 is high.

Explanation:

is this correct

4 0
3 years ago
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