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I am Lyosha [343]
3 years ago
10

What is the most important matter on science?!?!​

Chemistry
1 answer:
harkovskaia [24]3 years ago
3 0

Answer:

It is gas. We need oxygen, and plants need carbon dioxide. The air is like a gas. Plasma is in electric and they're also a type of gas.

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If you made a three-dimensional model of an atom and its nucleus, how would you represent the atom? 7th grade
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it shows the breakdown of the atom

Explanation:

it will show it molecularly

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Where is the nucleus located in the atom
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A can of soda at 27oC (mass of 310g) is placed in a freezer with a temperature of -14oC. How much energy must be removed for the
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3 years ago
29.0g silver combine completely with 4.30g of sulfur to form a compound. what is the percent composition of this compound?
Deffense [45]

Answer:

Percentage of silver and sulphur in the compound  is 87.08% and 12.91%  respectively

Explanation:

Given:

Amount of silver = 29.0 g

Amount of sulphur= 4.30 g

To find:

Percent composition of the compound=?

Solution:

\text { percent of compound }=\frac{\text { amount of element }}{\text { Total Molecule Mass }} \times 100

Total Molecule mass = amount of silver + amount of sulphur

Total Molecule mass = 29+4.3  

Total Molecule mass = 33.3g

Percentage of silver:

\text { Percentage of silver }=\frac{\text { amount of silver }}{\text { Total Molecule Mass }} \times 100

=>\frac{29.0}{33.3}\times100

=>0.8708 \times100

=> 87.08%

Percentage of silver:

\text { Percentage of silver }=\frac{\text {amount of suplhur}}{\text { Total Molecule Mass }} \times 100

=>\frac{4.30}{33.3}\times 100

=>0.1291\times 100

=> 12.91%

3 0
4 years ago
Any science fair project ideas? Something for 7th or 8th grade level.
evablogger [386]
You can test the Stroop Effect!
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