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TEA [102]
3 years ago
10

State and explain the three laws of chemical combination​

Chemistry
1 answer:
Elden [556K]3 years ago
5 0

Answer:

  • law of conservation of mass
  • law of definite proportion
  • Avogadro's law

Explanation:

Law of conservation of mass ⇒ it states that matter can neither be created or destroyed.In a reaction the energy and the mass remain constant

Law of definite proportion ⇒ it states that samples of compounds will always contain the same proportion of elements by mass.proportion of elements by weight will always remain the same;meaning that percent by weight in elements will remain the same regardless of origin and quantity

Avogadro's law ⇒ it sates that under the same conditions of pressure and temperature, equal volumes of all gases contain the same number of molecules.if there is 500 ml of carbon and oxygen, they will have the same molecules if exposed to the same pressure and teprature level

                   Hope this helps,and if it helps mark as branliest thx

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3. If 45.0 mL of 0.560 M KOH are needed to neutralize 125 mL of HCl of unknown concentration, what is
vlada-n [284]

Answer:

Molarity = 0.202 M

7.36 g/L HCl

Explanation:

KOH                        +                  HCl ----> KCl  +  H2O

1 mol                                           1 mol

0.560mol/L *0.045L                 x mol/L*0.125L

0.560mol/L *0.045L    =   x mol/L*0.125L

x = 0.560mol/L *0.045L  /0.125L= 0.2016 mol/L≈ 0.202 mol/L=0.202M HCl

M(HCl) = 1.0+35.5 = 36.5 g/mol

0.2016 mol/L*36.5 g/mol ≈ 7.36 g/L HCl

6 0
4 years ago
I need help if anyone will help plz
maksim [4K]

Answer:

D

Explanation:

If you look at the problem, and the coefficients (the little numbers on the bottom) you will see that on the reactant side you get a total of 11, you look over to the product side and you also get a total of 11.

B. is wrong because they’re are the same amounts

C.is wrong because they have the same amount of carbon

D. Now similar to B but slightly different the matter is the reactant side I’m pretty sure is equal to the amount on the product side.

If I had to take a strong guess though I would choose D just because the question is asking for the one that shows The law of conservation of mass. Pls make me brainlist

7 0
3 years ago
How do chemists explain on a molecular basis
Juli2301 [7.4K]

Explanation:

It happens because particles of gas are in constant random motion. Thus they can collide with the walls of the container causing pressure on the walls.

4 0
3 years ago
A sample of propane, C3H8, contains 14.6 moles of carbon atoms. How many total moles of atoms does the sample contain
seraphim [82]

Answer:

161 atoms

Explanation:

A sample of propane, C3H8, contains 14.6 moles of carbon atoms. How many total moles of atoms does the sample contain

every molecule of propane contains 3+8=11 atoms

so

14.6 moles contain 14.6 X 11 = 161 atoms

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3 years ago
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Ivanshal [37]

Answer:

They grow slowly over time, they are made up of multiple organisms.

Explanation:

One polyp is one individual. A Coral is made up of several polyps. Each polyp is less than 1 centimeters but a coral is made of many polyp so the coral itself cant be 1 centimeters across.

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