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nevsk [136]
3 years ago
15

What is a matter and how do it work?

Chemistry
1 answer:
postnew [5]3 years ago
3 0

Answer:

Matter is any <u>substance</u> that has mass and takes up space. Any physical object consists of matter. It doesn't matter whether it's an atom, element, compound, or mixture. It's all matter. (Not a pun, i promise ツ)

However, unlike some believe, not everything you encounter in the world is matter. Matter can be converted into energy, which has neither mass nor volume. So, light, sound, and heat <u>are not</u> matter. Most objects have both matter and some form of energy, so the distinction can be tricky. For example, <u>a candle flame</u> certainly emits energy (<u>light </u><u>and </u><u>heat</u>), but it also contains <u>gasses </u>and <u>soot</u>, so it is still matter. The building blocks of matter are called "atoms" and "molecules." They, too, are matter. The matter we can detect normally is called "baryonic" matter. However, there is another type of matter out there, which can't be directly detected. But its influence can. It's called dark matter.

Attached below is a picture of examples of matter.

<u>Key words and phrases: </u>

matter, heat, light, dark matter, baryonic matter, sound, energy, mass, volume, space, physical

Hope this helps! Brainliest would be much appreciated! Have a great day! :)

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Show the calculation of the mass of Ca3(PO4)2 needed to make 200 ml of a 0.128 M solution.
gavmur [86]

Answer:

We need 7.94 grams of Ca3(PO4)2

Explanation:

Step 1: Data given

Volume of Ca3(PO4)2 = 200 mL = 0.2 L

Molarity = 0.128 M

Molar mass of Ca3(PO4)2 = 310.18 g/mol

Step 2: Calculate moles of Ca3(PO4)2

Moles = molarity * volume

Moles Ca3(PO4)2  = 0.128 M * 0.2 L

Moles Ca3(PO4)2  = 0.0256 moles

Step 3: Calculate mass of Ca3(PO4)2

Mass Ca3(PO4)2  = moles Ca3(PO4)2  * molar massCa3(PO4)2

Mass Ca3(PO4)2  = 0.0256 moles * 310.18 g/mol

Mass Ca3(PO4)2  = 7.94 grams

We need 7.94 grams of Ca3(PO4)2

3 0
3 years ago
Explain how scientists use balanced chemical equations and molar mass concepts to represent reactions and account for the amount
konstantin123 [22]

Explanation:

Scientists most especially chemists use the mole concepts through balanced chemical equations and molar masses to represent chemical reactions and account for the amount of substances.

The mole concept entails finding molar relationships between reactants and products in a chemical reaction. Mole connects difference chemical parameters and it is used in quantitative analysis of chemical reaction.

  • First, we work from the known to the unknown.
  • The known is the specie whose mass or number of moles is given.

  Number of moles  = \frac{mass}{molar mass}

  • After obtaining the number of moles, then go ahead to compared using the balanced reaction with that of the unknown.
  • Then from them find the mass of the unknown.  
6 0
3 years ago
The combustion of propane C,H, produces carbon dioxide and steam.
Julli [10]

Answer:

23 moles

Explanation:

Given data:

number of moles of propane = 7.5 mol

Number of moles of carbon dioxide produced = ?

Solution:

Chemical equation:

C₃H₈ + 5O₂     →      3CO₂ + 4H₂O

Now we will compare the moles of propane and carbon dioxide.

                        C₃H₈             :             CO₂

                             1                :               3

                           7.5              :           3/1×7.5 = 22.5

22.5≅ 23 moles

7 0
3 years ago
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jeka57 [31]
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Good morning friends
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Answer:

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