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LUCKY_DIMON [66]
3 years ago
13

The Law of Conservation of

Chemistry
1 answer:
tankabanditka [31]3 years ago
6 0

Answer:

True.

Explanation:

Hello!

In this case, since the law of conservation of mass and energy states that both mass and energy cannot be neither created nor destroyed, if we want to analyze it in a chemical reaction, it is necessary to realize that the initial reactants are composed by a specific amount of atoms of each element and therefore the products must have that equal amount. For instance, going over the formation of water from hydrogen and oxygen:

H_2+O_2\rightarrow H_2O

We can see hydrogen are equal at both sides whereas oxygen do not; that is why we balance it by putting a coefficient of 2 just before hydrogen and water in order to equal the new 4 atoms of H and 2 atoms of O at each side.

2H_2+O_2\rightarrow 2H_2O

That is why this statement is true.

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The Haber process for making ammonia can be described by the balanced equation,
Natasha_Volkova [10]

Answer:

coverwow customer care number 8388026087//8388026087

3 0
3 years ago
A graduated cylinder has 65 mL of water at 25 oC. When 45.0 g of an unknow solid is dropped into the graduated cylinder, the liq
inysia [295]

Answer:

4.17 g/mL

Explanation:

In order to determine the density of the solid, we need to know both its mass and its volume.

<em>The mass </em>is already given to us by the problem, 45.0 g.

As for <em>the volume</em>, we can determine it by using <u>Archimedes' principle.</u> It states that the volume of water displaced by an object when submerged is equal to the object's volume.

  • Water displaced = 75.8 mL - 65 mL = 10.8 mL

Finally we <u>calculate the density</u> of the solid:

  • Density = mass / volume = 45.0 g / 10.8 mL
  • Density = 4.17 g/mL
6 0
3 years ago
What is EDTA , mainly used in Hematology
lord [1]
EDTA stands for ethylenediamine tetra - acetic acid. It is a crystalline acid with a strong tendency to form chelates with metal ions.
3 0
4 years ago
How many N2 molecules would exist in 500g of water at 20C?
tankabanditka [31]

We have to know the number of molecules present in 500 g of water.

The answer is: zero molecules present in 500g of water.

Water molecule is H₂O. In water molecule, nitrogen molecule can not be present. Molecular mass of water is 18 g. MOlecular mass of nitrogen molecule is 28 g.

500 g water contains 500/18 number of moles= 27.77 moles of water molecules which contains 27.77 X 6.023 X 10²³ number of water molecules.

There is no existence of N₂ molecule.

6 0
3 years ago
Rank from smallest to largest <br> a) 5583 nm<br> b) 0.001 um<br> c) 100 cm<br> d)3.456 x 10^-9
kari74 [83]

Answer:

if it's helpful for you please mark me brainliest answer thanks

Explanation:

5583= 3.456= 100= 0.001

4 0
3 years ago
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