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Black_prince [1.1K]
3 years ago
5

The beginning expansion of the big bang happened relatively slowly compared to how it is expanding now.

Chemistry
1 answer:
Sav [38]3 years ago
5 0
A. True_________________
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I have to write chemical formula and the electron-dot for each of the product and also show electric charge if ions are formed
Ilya [14]

bnswer

a. O +O / → O₂

b. K + Cl → KCl

c. C + O → CO

d. H + F → HF

e. I + I → I₂

f. S + O + O → SO₂

g. Na + Na + S → Na₂S

h. Li + Cl → LiCl

i. Ca + Br + Br → CaBr₂

j. N + N → N₂

A

8 0
1 year ago
Silicones are ________. Select one: A. flat sheets of silicon and hydrogen atoms B. flat sheets of silicon atoms C. chains of al
Anna007 [38]

Answer:

C. chains of alternating silicon and oxygen atoms with attached organic groups

Explanation:

It contains Silicone-Oxygen backbone as found in Silicone Dioxide (silica) but it also has organic groups attached to this backbone with Carbon-Silicone attachments. This whole arrangement of Silicone, Oxygen and Attached organic groups make up Silicones.

3 0
3 years ago
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Does a fish's scales shred as the fish grows larger
tia_tia [17]

Answer: No.

Explanation: Unless a disaster happens to their environment their scales will only grow.

7 0
3 years ago
Classify each of the following substances:
Keith_Richards [23]

Explanation:

Carbon dioxide is a polar molecule whose positive center is on the carbon atom: This positive center is able to attract (and accept) the lone electron pairs present on the oxide ion (O2-). carbon dioxide is acts as a Lewis acid

A Lewis acid can accept a pair of electrons from a Lewis base. The boron in BF3 is electron poor and has an empty orbital, so it can accept a pair of electrons, making it a Lewis acid. A Lewis acid is defined as an electron-pair acceptor.

In CO molecule, there is a lone pair on both carbon and oxygen. The substance which can donate an electron pair are called Lewis base. It is clear that CO molecule can donate an electron pair and hence, it is a Lewis base. Also, CO can be BOTH a Lewis acid and base.

Oxygen is a Lewis base (that too a weak one), not a Lewis acid. REASON: It has lone pair of electrons, which can be donated to electron-deficient species (Lewis acids).

Methane is Neither a Lewis Acid or Lewis Base.

5 0
3 years ago
When using science to investigate physical phenomena, which characteristic of the event must exist?
Maru [420]
 "Observable" is the one characteristic of event that must exist when <span>using science to investigate physical phenomena. </span>
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3 years ago
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