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3 years ago

Даю 90 баллов, помогите

Chemistry

1 answer:

aleksklad [387]3 years ago

5 0

Answer:

MgCO3, Ca(OH)2, AgNO3

Explanation:

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What does solubility mean?

jasenka [17]

Answer: the ability to be dissolved, especially in water.

Explanation: I think the answer you've picked is right

Hope this helps

8 0

3 years ago

Are the following combinations allowed? If not, show two ways to correct them:

mafiozo [28]

The following combination of n=3 ; l=1 ; ml=-2 is not allowed. One way to correct this would be by changing the azimuthal quantum number, l and the other way would be to change the magnetic quantum number, m.

<h3>Is the following combination n=3; l=1; ml=-2 allowed or not.? If not, suggest two ways through which it can be corrected.</h3>

The following combination of n=3 ; l=1 ; ml=-2 is not allowed.

There are several rules that need to be followed for assigning electron quantum numbers. They are:

1. Principal quantum number should be 1 ≤ n

2. Azimuthal quantum number, 0 ≤ l ≤ n − 1

3. Magnetic quantum number, -l ≤ ml ≤ l

4. Spin quantum number as either -1/2 or +1/2

For n = 3,

l should be n - 1 or n - 2 or n - 3 = 2, 1, 0 respectively.

If we choose l = 1 then ml should be -1, 0 and +1

Therefore, one way to correct the combination would be to change the magnetic quantum number to -1

If we choose l = 2 then ml would be -2, -1, 0, +1, +2

Thus, another way to correct the combination is to choose the azimuthal quantum number as 2.

Thus, the following combination of n=3; l=1; ml=-2 is not allowed. One way to correct this would be by changing the azimuthal quantum number, l and the other way would be to change the magnetic quantum number, m.

To learn more about quantum numbers refer:

brainly.com/question/5927165

#SPJ4

5 0

2 years ago

if you obtain the powder of a mineral by rubbing a mineral on a porcelain plate, which property have u observed?

charle [14.2K]

you have observed streak :)

7 0

3 years ago

Read 2 more answers

Use Lewis theory to determine the chemical formula for the compound formed between Sr and N.

mariarad [96]

Answer:

$Sr_3N_2$

Explanation:

Hello,

In this case, since the Lewis theory is based on the bonds formation between atoms via the valence electrons, we can verify the chemical formula of the compound formed by strontium and nitrogen by noticing that strontium has two valence electrons as it is in group IIA, for that reason, two nitrogens should be available for bonding. Therefore, since nitrogen is in group VA, it is said that three electrons are required to attain the octet (maximum amount bonded electrons), for that reason, three strontiums are should be available for bonding. In such a way, the formula should be:

$Sr_3N_2$

Regards.

8 0

3 years ago

Why does air at 75% relative humidity and 30°C make your skinfeel stickier than air at 75% relative humidity and 10°C

ahrayia [7]

Here are the choices:

Warm air rises while cold air falls.

The warmer air contains less water vapor per unit of volume.

The warmer air contains more water vapor per unit of volume.

Moist air has lower density than dry air does.

The best answer is: <em>The warmer air contains more water vapor per unit of volume. </em>

8 0

3 years ago

Read 2 more answers