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3 years ago

I NEED HELP WITH THIS CHEMISTRY QUESTION PLS

Chemistry

1 answer:

Tatiana [17]3 years ago

5 0

Answer:

Iron, according to:

$2Al(s)+3Fe(NO_3)_2(aq)\rightarrow 3Fe(s)+2Al(NO_3)_3(aq)$

Explanation:

Hi there!

In this case, according to the law of conservation of mass, which states that matter cannot be neither created nor destroyed, it is possible for us to figure out the missing element in the reaction by taking into account this is a single displacement reaction in which Al goes with NO3 to produce the Al(NO3)3, and therefore the other element would be iron (Fe) as can be seen on the following chemical reaction:

$2Al(s)+3Fe(NO_3)_2(aq)\rightarrow 3Fe(s)+2Al(NO_3)_3(aq)$

Best regards!

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2. Since there is one gram per every mL, there are 109776.94173602 g of water in the fish tank.

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A sample of water is heated from 60.0 °C to 75.0°C by the addition of 140 j of

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Mass of the water : 2.23 g

<h3>Furter explanation</h3>

Heat

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c = heat capacity, for water : 4.18 J/g° C.

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3 years ago

100.mL of a .795 M solution of KBr is diluted to 500.mL. what is the new concentration of the solution?

kap26 [50]

Answer:

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zalisa [80]

<u>Answer:</u> The chemical equation is written below.

<u>Explanation:</u>

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This also means that total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.

The chemical equation for the reaction of elemental boron and oxygen gas follows:

$4B+3O_2\rightarrow 2B_2O_3$

By Stoichiometry of the reaction:

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By Stoichiometry of the reaction:

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Hence, the chemical equations are written above.

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