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pychu [463]
2 years ago
15

Compare the type of change that occurs when a match is burnt and when a liquid starts boiling. Use complete sentences to justify

the type of change that occurs. (10 points)
Chemistry
1 answer:
Alexandra [31]2 years ago
8 0

Answer: When a match is burnt, the fire catches

Explanation: because

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How many grams of O2 are reacted when 3.5<br> mols of P203 are formed?
Neporo4naja [7]
1.45 moles of P2O3 contains 1.45 moles of O3 which means 4.35 moles of O:

1.45 × 3 = 4.35 moles of O

Then you can calculate moles of O2 by dividing it by 2:

4.35 moles ÷ 2 = 2.175 moles of O2 needed
7 0
2 years ago
What is the best name for this molecule? Explain your naming process.
iogann1982 [59]

Hi!


The best possible name for this molecule would be: 4 - ethyl - 1 - heptene or 4 - ethylhept - 1 - ene


We always name the molecule with respect to the longest chain (in a branched molecule), taking both atoms of carbon participating in the double bond into account too. In our case, this gives us a 7 Carbon chain - hept

ene - is the suffix that is indicative of the molecule being an alekene.

<em>So we know it is a branched heptene molecule</em>

We add the number where the double bond occurs either before ene, or before heptene as a rule.

<em>Note: We always start with the end of the chain from where the double bond is the closest, and number the carbons accordingly.</em>

The title and position of the branch always comes at the start. In our case the branch is a two carbon chain, and an alkane, so it would be an ethyl branch. This branch occurs at carbon number 4


Hence, the correct names would be:

<em>4 - ethyl - 1 - heptene</em> or <em>4 - ethylhept - 1 - ene</em>


Hope this helps!

7 0
3 years ago
Concentrated sulfuric acid is generally used to promote acid-catalyzed dehydration because:
ira [324]
Concentrated  sulfuric  acid  is  used    to promote  acid  catalyzed  dehydration  because  it  has   little  water.This favor the  forward  reaction.sulfuric  acid  acts  as  as  proton  source  to  enable  loss  of  leaving  group  in  forward  reaction  and electrophile  addition  in  reverse  reaction.
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3 years ago
In atoms, electrons surround the nucleus in?
Charra [1.4K]

either the answer is  B or D

4 0
3 years ago
Read 2 more answers
PLZ HELP
riadik2000 [5.3K]
Too many to know in the world.
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4 years ago
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