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Greeley [361]
4 years ago
10

Which answer choice correctly names the element that Mendeleev predicted would be discovered and

Chemistry
1 answer:
Monica [59]4 years ago
6 0

Answer:

gallium (Ga)

Explanation:

Initially called ekaluminum, of less atomic mass than rare earth elements;  the ekaluminum, today knows that gallium (Ga); it was one of the 4 elements that Mendeleev predicted, and this Mendeleev leaves a space on the table to be placed in the aluminum column.

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Balance the double replacement: <br> Mn(SO4)2 + K2S2O3 =
Firlakuza [10]

Answer:

        Mn(SO₄)₂ + 2 K₂S₂O₃ ----------> Mn(S₂O₃)₂ + 2 K₂SO₄

Explanation:

Reaction Given:

              Mn(SO₄)₂ + K₂S₂O₃ =

Balance Equation = ?

Solution:

Balance Chemical Equation:

A balanced chemical equation is that in which the number of the reactant atoms equal to the number of the product atom.

For example if the Sulfur at the reactant side is 6, the number of Sulfurmust be 6 on the product side.

First we Complete the reaction

                  Mn(SO₄)₂ + K₂S₂O₃ ----------> Mn(S₂O₃)₂ + K₂SO₄

Check the chemical equation and count the number of atoms at the reactant side and product side.

If the number of atoms of the reactants equal to the number of atoms of products then the reaction is balanced but if not equal, then reaction is not balanced

Balancing is an trial and error process to get a balance reaction.

First we count the number of atoms of reactant and product

             Mn(SO₄)₂ + K₂S₂O₃ ----------> Mn(S₂O₃)₂ + K₂SO₄

Number of atoms of Reactant:

Mn = 1

S = 4

O = 7

K = 2

Number of atoms of Product:

Mn = 1

S = 5

O = 10

K = 2

So this is not a balance equation as the atoms of the reactant atoms not equal to the number of the product atoms.

As there are 4 Sulfur, and 7 oxygen atoms at reactant side but 5 Sulfur, and 10 oxygen atoms at the product side so we balance this along with other

Balanced Equation:

          Mn(SO₄)₂ + 2 K₂S₂O₃ ----------> Mn(S₂O₃)₂ + 2 K₂SO₄

Now count the number of atoms of reactant and product

Number of atoms of Reactant:

Mn = 1

S = 6

O = 14

K = 4

Number of atoms of Product:

Mn = 1

S = 5

O = 10

K = 2

Now this reaction is balanced as the atoms of the reactant atoms equal to the number of the product atoms.

So,

the Coefficient of  K₂S₂O₃ and K₂SO₄ is 2 in balanced equation

4 0
3 years ago
What can we deduce from the list of ingredients of a product on a container or it’s packaging
Dvinal [7]

Answer:

The English and French versions of the list of ingredients must begin on a separate line, except, for small packages with an available display surface (ADS) of less than 100 cm 2, where the second language version of the list of ingredients may start after the end of the first language list [B.01.008.2(9), FDR].

Explanation:

4 0
3 years ago
Lie on a bed?<br> What type of force are you exerting when you
Alexxx [7]
Static force is being exerted
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3 years ago
HURRY PLEASE
Reika [66]
Magnetic fields that attract and repel, gravity, and friction with the ground/track are the forces that act upon a meglev train. a maglev train is a train that is propelled by magnets on both the train and the tracks. gravity plus friction plus magnetic fields equals a maglev train.
6 0
3 years ago
One way to refine iron from iron ore is to heat the ore with hydrogen gas at high temperatures. Which change increases the amoun
tensa zangetsu [6.8K]

Answer: Adding Hydrogen Gas

Explanation:

The Reduction Reaction that occurs during the refinement of Iron Ore is as follows:

Fe_3O_4 + H_2  -> 3FeO + H_2O\\\\FeO + H_2   -> Fe + H_2O

Since Hydrogen Gas is a reactant in the equation with Iron ore , adding more hydrogen gas will shift the reaction toward the right side, increase the amount of  refined iron produced.

8 0
4 years ago
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