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3 years ago

In a chemical equation, the sum of the masses ______.

Chemistry

2 answers:

Readme [11.4K]3 years ago

5 0

C. Of the products is equal to the reactants.

Good luck out there! :)

fiasKO [112]3 years ago

3 0

Answer: of the products is equal to the reactants

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation for formation of water :

$2H_2+O_2\rightarrow 2H_2O$

mass of reactants = mass of hydrogen + mass of oxygen = $2mol\times 2g/mol+1\times 32g/mol=36g$

mass of product = mass of water = $2mol\times 18g/mol=36g$

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Purification of nickel can be achieved by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an el

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Answer: 530 hours

Explanation:

The reduction of Nickel ions to nickel is shown as:

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$Q=I\times t$

where Q= quantity of electricity in coloumbs = 59182282.8C

I = current in amperes = 31.0 A

t= time in seconds = ?

$59182282.8C=31.0A\times t$

$t=1909105.9sec$

(1h=3600 sec)

$t=530hours$

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2 years ago

describes a type of reaction in which negative ions in two compounds switch places , forming two new compounds

Nadusha1986 [10]

Answer:

A double displacement reaction or double replacement reaction.

Explanation:

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3 years ago

Read 2 more answers

PLEASE HELP

eduard

Answer:

The correct answer is A) circulatory

Explanation:

The circulatory system collects metabolic wastes from the blood, which will be eliminated by the kidneys through urine.

The kidneys are responsible for the elimination of waste, acids and excess fluid from the body, maintaining the balance of water, salts and minerals. Blood flows into the kidney through the renal artery.

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3 years ago