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KatRina [158]
4 years ago
7

Which two cities are located in the Erie Ontario Lowlands?

Chemistry
1 answer:
Leya [2.2K]4 years ago
6 0
New york city and river head .
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Unknown halogen X2 was added to each of two test tubes which contained aqueous NaCl and aqueous NaI, respectively. When hexane w
weeeeeb [17]

Answer:

Br_2

Explanation:

The compound X_2 is Br_2.

The reaction included are:

Br_2+NaCl--> No\ reaction  (because  bromine is less reactive than chlorine)

But , because of hexane the solution get dilute and its color changes to orange.

Now, NaI is added and we know Br is more reactive than I.

Therefore it replace it.

Reaction: Br_2+NaI-->NaBr+I_2

Purple color develop due to formation of Iodine.

7 0
3 years ago
Select the correct answer.
Lera25 [3.4K]

Answer:

1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}

Explanation:

S is in 3d period, so it has 3 levels

1 level has 2 electrons, 2d level 8 electrons, 3d level 6 electrons

1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}

3 0
4 years ago
Phcl2 lewis structure
DiKsa [7]

Answer:

What do you want answered?

Explanation:

4 0
3 years ago
Q2. The table gives the composition of three particles.
Kisachek [45]

Answer:

The proton and electrons are equal,

15protons and 15electrons

Explanation:

An atom is the smallest electrical neutral particle of an element so it means that every atom have same number of protons and electrons.

8 0
3 years ago
Is burning of coal a reversible change???<br> If yes how?
koban [17]
I don't think so. No way that I know anyway. It it could be done then the need for more coal to be mined would have stopped hundreds of years ago. Once coal is burned, it forms water and carbon dioxide (essentially) with some sulfur oxides. 

How do you put that back together again. It's a little like humpty dumpty.
5 0
3 years ago
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