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11111nata11111 [884]
3 years ago
9

Use the law of constant composition to complete the following table summarizing the amounts of iron and chlorine produced upon t

he decomposition of the sample of iron(III) chloride. Mass FeCl3 Mass Fe Mass Cl Sample A3.785 g1.302 g2.483 g Sample B1.475 g _____ _____
Chemistry
2 answers:
gayaneshka [121]3 years ago
7 0
So your question ask to complete the table in your problem using the law of constant composition and the table summarize the amount of iron and chlorine produced upon the decomposition of the sample iron and the data that would complete the table is FeCi3(162.2), Fe(0.508), Cl(0,967)
lisabon 2012 [21]3 years ago
3 0

Answer : The mass of Fe and Cl in sample B is 3.341 g and 6.371 g respectively.

Explanation :

Law of definite proportion : It is defined as a given compound always contains exactly the same proportion of elements by weight.

The balanced chemical reaction will be,

2FeCl_3\rightarrow 2Fe+3Cl_2

First we have to calculate the ratio of mass of FeCl_3.

\text{Ratio}=\frac{\text{Mass of }FeCl_3 \text{in sample A}}{\text{Mass of }FeCl_3 \text{in sample B}}

\text{Ratio}=\frac{3.785g}{1.475g}=2.566

Now we have to calculate the mass of Fe and Cl in sample B.

\text{Mass of Cl in sample B}=2.566\times \text{Mass of Cl in sample A}

\text{Mass of Cl in sample B}=2.566\times 2.483g=6.371g

and,

\text{Mass of Fe  in sample B}=2.566\times \text{Mass of Fe in sample A}

\text{Mass of Fe in sample B}=2.566\times 1.302g=3.341g

Therefore, the mass of Fe and Cl in sample B is 3.341 g and 6.371 g respectively.

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2Na + Cl2 → 2NaCl
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x. ➡️ 29.3 g
x =  \frac{46 \times 29.3}{117}  \\ x = 11.5 \: g
5 0
3 years ago
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A 500.0 g block of dry ice (solid CO2, molar mass = 44.0 g) vaporizes at room temperature. Calculate the volume of gas produced
Damm [24]

Considering the ideal gas law, the volume of gas produced at 25.0 °C and 1.50 atm is 184.899 L.

<h3>Definition of ideal gas</h3>

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

<h3>Ideal gas law</h3>

An ideal gas is characterized by absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of gases:

P×V = n×R×T

<h3>Volume of gas</h3>

In this case, you know:

  • P= 1.50 atm
  • V= ?
  • n= 500 g×\frac{1 mole}{44 g}= 11.36 moles, being 44 \frac{g}{mole} the molar mass of CO₂
  • R= 0.082 \frac{atmL}{molK}
  • T= 25 C= 298 K (being 0 C=273 K)

Replacing in the ideal gas law:

1.50 atm×V = 11.36 moles×0.082\frac{atmL}{molK} × 298 K

Solving:

V= (11.36 moles×0.082\frac{atmL}{molK} × 298 K) ÷ 1.50 atm

<u><em>V= 184.899 L</em></u>

Finally, the volume of gas produced at 25.0 °C and 1.50 atm is 184.899 L.

Learn more about the ideal gas law:

<u>brainly.com/question/4147359?referrer=searchResults</u>

4 0
2 years ago
(please, I need some help)
olga55 [171]
c) the salt solubility decreases with temperature.

Salts usually dissolve in water at a given temperature. When water cannot dissolve anymore salt at that same temperature, it is known as a saturation point. With most substances the solubility increases with increase in temperature. Same is the case for a salt like potassium nitrate. With increase in temperature the ability of it to dissolve in water increases. And so with decrease in temperature, the solubility decreases.
7 0
3 years ago
In ____________ reactions, certain molecules are broken down; in the process they release energy which is captured when high-ene
Rudik [331]

Answer:

Exergonic ,Endergonic,low concentration area,high

Explanation:

In exergonic reaction,certain molecules are broken down;in the process they release energy which is captured when high energy molecules(such as ATP and NADH) are formed.

                          The breakdown of these molecules can be coupled to thermodynamically unfavorable processes such as Endergonic reactions or pumping og hydrogen ion from low concentration areas to high concentration areas.

3 0
2 years ago
The specific heat of wood is 2.03 J/g.°C. How much
Brilliant_brown [7]

Answer:

11419 J/g/ 11.419 KJ/g

Explanation:

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H=225×2.03×(-15-10)

H=225×2.03(25) Note; negative sign is of no use

H=11419J/g

3 0
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