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adell [148]
3 years ago
11

When iron sulfide (FeS) is combined with hydrogen chloride (HCl), a gas is formed in a double-displacement reaction. Which gas w

ould it be? A. FeS, B. FeH, C. H2S, D. H2Fe
Chemistry
2 answers:
irakobra [83]3 years ago
3 0
The answer is C. H2s
zhenek [66]3 years ago
3 0

Answer : The correct option is, (C) H_2S gas

Explanation :

Double replacement reaction : It is a type of chemical reaction in which a positive cation and a negative anion of two reactants exchange their places to form two new products.

It is represented as,

XY+AB\rightarrow XB+AY

(X and A are the cations, Y and B are the anions)

When the iron sulfide (FeS) combined with hydrogen chloride (HCl) to give iron(II)chloride and hydrogen sulfide gas as a product.

The balanced chemical reaction will be,

FeS(s)+HCl(l)\rightarrow FeCl_2(s)+H_2S(g)

Hence, the gas would be, (C) H_2S gas

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A 996.9 g sample of ethanol undergoes a temperature change of -70.98 °C while releasing 62.9
Volgvan

Answer:

c=3.71\ J/g^{\circ} C

Explanation:

Given that,

Mass of sample, m = 996.9 g

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The heat released by a sample due to change in temperature is given by :

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Where

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So,

c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{263173.6}{996.9\times 70.98}\\\\c=3.71\ J/g^{\circ} C

So, the specific heat of ethanol is equal to 3.71\ J/g^{\circ} C.

3 0
4 years ago
Describe the process of making the four major macromolecules.
dybincka [34]

Answer:

<em>Proteins, carbohydrates, nucleic acids, and lipids are the four major classes of biological macromolecules—large molecules necessary for life that are built from smaller organic molecules. Macromolecules are made up of single units known as monomers that are joined by covalent bonds to form larger polymers.</em>

Explanation:

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8 0
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Fynjy0 [20]

a)

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b)

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c)

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d)

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e)

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or

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5 0
3 years ago
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