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3 years ago

• Balance this chemical equation.

Chemistry

1 answer:

user100 [1]3 years ago

4 0

Answer:

Explanation:

Chemical equation:

FeCl₃ + NaOH → Fe(OH)₃ + NaCl

Balanced chemical equation:

FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaCl

Step 1:

FeCl₃ + NaOH → Fe(OH)₃ + NaCl

Fe = 1 Fe = 1

Cl = 3 Cl = 1

Na = 1 Na = 1

OH = 1 OH = 3

Step 2:

FeCl₃ + 3NaOH → Fe(OH)₃ + NaCl

Fe = 1 Fe = 1

Cl = 3 Cl = 1

Na = 3 Na = 1

OH = 3 OH = 3

Step 3:

FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaCl

Fe = 1 Fe = 1

Cl = 3 Cl = 3

Na = 3 Na = 3

OH = 3 OH = 3

Now we the equation is completely balanced and follow the law of conservation of mass because there are equal number of atoms of each elements are present on both side.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction .

Type of reaction:

It is double displacement reaction.

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

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Change the given word equation into balanced equation <br><br>Hydrogen+Chloride=Hydrogen chloride

nirvana33 [79]

Answer:

h2 +2cl -> 2hcl

Explanation:

h2 + cl -> HCl

h2 +2cl -> 2hcl

3 0

4 years ago

Minimum energy required for an effective collision is called

astra-53 [7]

Answer: Activation energy

Explanation:

https://www.google.com/search?q=minimum+energy+for+effective+collision&oq=minimum+energy+for+effective+collision&aqs=chrome..69i57j0l2j69i61.4832j1j7&sourceid=chrome&ie=UTF-8

8 0

3 years ago

The density of ice is 920 kg/m3 and that of sea water is 1030 kg/m3 . what fraction of the total volume of an iceberg is exposed

Lyrx [107]

To be floating, the gravity force of the iceberg should be same as the buoyancy force that result from the difference of the ice and water density.
The density of ice is 920 and water is 1030, then the difference should be: 1030kg/m3-920kg/m3= 110kg/m3

Let say that the volume of ice below the water is volume1 and the volume above the water(exposed volume) is volume2.
You can get this equation

volume1+volume2= 100%
volume1= 100%- volume2

Insert it into the buoyancy and gravity force will result
buoyancy=gravity
110kg/m3*volume1= 920kg/m3 *volume2
110kg/m3*(100%- volume2)= 920kg/m3 *volume2
110kg/m3 - 110kg/m3*volume2= 920kg/m3 *volume2
110kg/m3 = 1030kg/m3 *volume2
volume2= 110/1030= 0.1067= 10.7%

7 0

3 years ago

Anyone know how to answer this?

Neporo4naja [7]

Answer:

i metal

ii nonmetal

iii metal

iv nonmetal

Explanation:

If you look up what the element of a heater is, you get a picture of some sort of rod. It's the heating element of the heater, and must be some type of metal to conduct electricity and warm up. Fishing rods are made of either fiberglass, graphite, or carbon fibre. These are nonmetals. In order for a lightning rod to conduct electricity and bring the lightning down to the ground, it has to be metal. You wouldn't want a metal oven mitt, as that would burn your hand.

4 0

3 years ago

What do we mean when we say a chemical reaction is balanced? (Several choices can be correct.)

Rina8888 [55]

Answer:

2 and 3

Explanation:

A chemical reaction is defined as the process in which two or more reactants combined together chemically and gives a different product.

A balanced chemical equation involves an equal number of atoms on the reactant and product side. A balanced chemical reaction occurs when the atoms present on the reactant side or left side of the arrow is equal to the atoms on the product side or right side of the arrow.

The process of the balanced chemical equation is based on errors and trials in which the atoms in each element is identified, the atoms are then multiplied with required numbers, the addition of coefficient in front of molecules and check the equation at last.

Hence, the correct options are "2 and 3".

3 0

3 years ago