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topjm [15]
3 years ago
13

Please help! I don't understand, I asked for help but no one knows the answer.

Chemistry
2 answers:
faltersainse [42]3 years ago
3 0
I've put in some of the answers.
hope this helps :)

FinnZ [79.3K]3 years ago
3 0

Answer:

You will find the answer in the attach.

Explanation:

The diagram describes the distribution or circulation of winds. They go from sites of high pressure (H) to sites of low pressure (L).

The terms cold and warm front refers to winds fronts of low or high temperature. When a cold front reaches a warm one, resulting in an occlusion (occluted front).

A strong wind front can be acompanied by clouds (strong winds very cloudy) or not (strong winds cloudless).

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Which ions remain in solution after pbi2 precipitation is complete? express your answers as ions separated by a comma?
olga nikolaevna [1]

Answer;

K+ and NO3- ions

Explanation;

The main ions remaining are K+ and NO3- ions after pbi2 precipitation is complete.

However; There will always be tiny amounts of Pb2+ and I- ions, but most of them are in the solid precipitate.

7 0
4 years ago
There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.55%. A weighted average uses the percen
alekssr [168]

Answer:

2.765amu is the contribution of the X-19 isotope to the weighted average

Explanation:

The average molar mass is defined as the sum of the molar mass of each isotope times its abundance. For the unknown element X that has 2 isotopes the weighted average is defined as:

X = Mass X-19 * Abundance X-19 + MassX-21 * Abundance X-21

The contribution of the X-19 isotope is its mass (19.00 amu) times its abundance (14.55% = 0.1455). That is:

19.00amu * 0.1455 =

2.765amu is the contribution of the X-19 isotope to the weighted average

8 0
3 years ago
What do genotype will appear in boxes 2 and 3?
VMariaS [17]
Tt is the genotype that will appear in boxes two and three.

If you look at the column and row that intersect to form boxes two and three, you will see that they are T and t. That is the best way I can describe it, sorry if it’s confusing.
3 0
3 years ago
Read 2 more answers
Draw the Lewis structure (including all lone pair electrons and any formal charges) for one of the four possible isomers of C3H9
Alexus [3.1K]

Answer and Explanation

The isomer picked is the N-Propylamine.

It has a lone pair of electron available on the electron rich Nitrogen and no formal charge.

Since it will be hard to draw the Lewis structure in this answer format, I'll attach a picture of the Lewis structure to this answer.

The lone pair of electron is shown by the two dots on the Nitrogen atom.

6 0
3 years ago
2. A copper wire can conduct electricity whether the wire is
Stells [14]

Answer:

Intensive

Explanation:

The electrical conductivity of a wire depends on its composition, not the length of the wire.

Hope this helps! If correct pls mark brainliest :)

7 0
3 years ago
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