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GrogVix [38]
3 years ago
5

Consider the cell described below at 259 K: Ni | Ni2+ (1.15 M) || Fe3+ (2.23 M) | Fe Given the standard reduction potentials fou

nd on the sheet attached to the exam, calculate the cell potential after the reaction has operated long enough for the [Fe3+] to have changed by 1.248 M
Chemistry
1 answer:
likoan [24]3 years ago
8 0

Answer:

i dont know sorry :(

Explanation:

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Fran finds a dark-colored rock that she identifies as basalt. Which property gives the rock its dark color?
ser-zykov [4K]

Answer:

Augite or other dark-colored Pyroxene minerals

Explanation:

Basalt is given a dark color because it has a high amount of Augite and other dark-colored Pyroxene minerals.

7 0
3 years ago
Which of the following phase changes only occurs in solids possessing vapor pressures above atmospheric pressure and at ambient
GuDViN [60]

<u>Answer:</u> The phase change process in which solids gets converted to gases is sublimation.

<u>Explanation:</u>

For the given options:

<u>Option a:</u>  Condensation

It is a type of process in which phase change occurs from gaseous state to liquid state at constant temperature.

Gas\rightleftharpoons Liquid

<u>Option b:</u>  Melting

It is a type of process in which phase change occurs from solid state to liquid state at constant temperature.

Solid\rightleftharpoons Liquid

<u>Option c:</u>  Sublimation

It is a type of process in which phase change occurs from solid state to gaseous state without passing through the liquid state at constant temperature.

Solid\rightleftharpoons Gas

<u>Option d:</u>  Deposition

It is a type of process in which phase change occurs from gaseous state to solid state without passing through the liquid state at constant temperature.

Gas\rightleftharpoons Solid

Hence, the phase change process in which solids gets converted to gases is sublimation.

4 0
3 years ago
How many moles of silver can be produced from silver nitrate from 1 mole of zinc?
jasenka [17]

Answer:

Answer: 6.5 moles of silver metal is formed in the given chemical reaction. The moles of excess reagent left are 0.55 moles.

Explanation:

To calculate the moles of silver formed and the moles of excess reagent left after the reaction, we need to balance the equation first and need to find the limiting and excess reagent.

The balanced chemical equation is:

Zn + 2AgNO3 ---> Zn (NO3)2 +2Ag

By Stoichiometry:

2 moles of Silver nitrate reacts with 1 mole of Zinc metal

So, 6.5 moles of silver nitrate will react with = 1/2 x 6.5 = 3.25 moles of zinc metal

The required amount of zinc metal is less than the given amount of zinc metal,  hence, it is considered as an excess reagent.

Therefore, silver nitrate is the limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

2 moles of silver nitrate produces 2 moles of silver metal

So, 6.5 moles of silver nitrate will produce = 2/2 x 6.5 = 6.5moles of silver metal.

Number of moles of excess reagent left after the completion of reaction = (3.8 - 3.25)moles = 0.55 moles

Hence, 6.5 moles of silver metal is formed in the given chemical reaction. The moles of excess reagent left are 0.55 moles.

4 0
2 years ago
What type of reaction is : CaCo3+ HCl = CaCl2 + CO2 +H2O
Pavlova-9 [17]

Answer:

Double decomposition reaction

Explanation:

When hydrochloric acid reacts with any carbonates/hydrogen carbonates the products formed are metal chloride , water and carbon dioxide.Since HCl decomposes salts of weaker acids.

So the equation of the reaction between calcium carbonate and HCl is:

CaCO3+2HCl =CaCl2+H2O+CO2

This reaction is also known as double decomposition reaction.

7 0
3 years ago
Read 2 more answers
Which is a property of both alkenes and alkynes?
musickatia [10]
Their boiling points tend to increase with chain length.<span>
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6 0
3 years ago
Read 2 more answers
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