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jarptica [38.1K]
2 years ago
14

Heyhere to help and to serve

Chemistry
2 answers:
Fantom [35]2 years ago
8 0

Answer:

Thank you for your service! :P

Explanation:

My name is Ann [436]2 years ago
5 0

Answer:

lol thx

Explanation:

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Classify each of the following changes as Physical or Chemical:
ddd [48]

Explanation:

Physical changes are the changes that does not lead to any change in chemical composition of a substance.

For example, mass, density, volume are all physical changes.

On the other hand, a change that leads to formation of a new compound by changing the chemical composition of reactants or combining atoms is known as a chemical change.

For example, combustion, toxicity, reactivity etc are all chemical changes.

Therefore, given changes are identified as follows.

  • Coal burning : It is a combustion reaction. Hence, it is a chemical change.
  • Ice melting : Physical state of water changes from solid to liquid. Hence, it is a physical change.
  • mixing chocolate syrup with milk : No new compound is forming as there is no chemical reaction occurring. Hence, it is also a physical change.
  • explosion of a firecracker : It shows reactivity of fire cracker. Hence, it is a chemical reaction.
  • magnetizing of a screwdriver : It shows physical attraction between the magnet and screwdriver. Hence, it is a physical change.

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3 years ago
You turn on your gas fireplace at home and wonder why you don't immediately feel the
DENIUS [597]

Answer:

the (air) atmosphere

Explanation:

it fast go to the atmosphere

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2 years ago
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What is the purpose of plasma membrane?
kobusy [5.1K]

Its to protect the cell from its surroundings, its selectively permeable to ions and organic molecules

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2 years ago
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Which of the following<br> are hydrocarbons? Check all that apply.<br> A.<br> B.<br> C.<br> D.
lutik1710 [3]

Answer:

its B and D

Explanation:

other person is wrong.

3 0
2 years ago
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1.As you move from left to right across a period,the number of valence electrons
never [62]
1. it increases then decreases i.e +1, +2, +3, +4, +5, -2, -1 then 0.
2. group 6 elements have more valence electrons than group 2.
3.fluorine is the most reactive because reactivity and electronegativity reduces down the group.
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3 years ago
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