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shepuryov [24]
3 years ago
5

If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a

Chemistry
2 answers:
Akimi4 [234]3 years ago
5 0

Answer:

B

Explanation:

physical change is the answer I hope

Morgarella [4.7K]3 years ago
3 0

Answer:

A

Explanation:

it is A because i am really smart

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3 years ago
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Calculate the number of Cl atoms that are in 1.1 x 10^-21 moles of Cl atoms.
Margarita [4]

According to Avogadro's number there are 62.53 atoms of chlorine in 1.1x 10^-21 moles of Cl atoms.

<h3>What is Avogadro's number?</h3>

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number or number of moles×Avogadro's number.

ON substitution in above formula number of atoms=1.1×10²¹×6.023×10²³=62.53 atoms

Thus, there are 62.53 chlorine  atoms in 1.1x 10^-21 moles of Cl atoms.

Learn more about Avogadro's number,here:

brainly.com/question/11907018

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6 0
1 year ago
Which subctant will not conduct electricity a Aluminium b copper c plastic d steel​
jolli1 [7]

Answer:

plastic

Explanation:

4 0
3 years ago
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Which family on the periodic table has a filled outer energy level?
Ede4ka [16]

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3 years ago
Sam places 5 g of baking soda in 5 g of liquid vinegar, and notices fizzing. After all the fizzing stops, 5 g of liquid remains.
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5 g of gas escaped
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3 years ago
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