What quantity of aluminium is deposited when a current of 10A is passed through a solution of aluminium salt for 1930s? (All=27,F=96500cmol)

Answers

Answer 1

Answer:

The amount of aluminum deposited when a current of 10A is passed through a solution of aluminum salt for 1930s is 5.4 g.

What is electrochemical cell ?

An electrochemical cell converts chemical energy into electrical energy. Metals with higher negative electrode potential undergo oxidation and its ionization produces electron flow through the solution.

The weight of the metal that deposited by reduction is related to the mass of metal, current passed and time as follows:

w = z It

where z = E/96500 F

Equivalent mass of Al, E = 27 g

t = 1930 s

current I = 10 A.

Now, the weight of aluminum metal deposited is calculated as follows:

w = 1930 s × 10 A × 27/96500 = 5.4 g.

Therefore, the weight of Al deposited on the electrode is 5.4 g.

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Answer 2

Answer:

Answer:

AL*3+ + 3e- =AL.

（10A×1930）÷96500=0.2mole e-

0.2÷3×27=1.8g（AL）

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The volume of a gas at 99.0 kPa is 300.0 mL. If the pressure is increased to 188kPa, what will be the new volume?

Answers

Answer:

158.0 mL

Explanation:

We can solve this problem by using Boyle's law, which states that:

"For a fixed mass of a gas kept at constant temperature, the pressure of the gas is inversely proportional to its volume"

Mathematically:

$p\propto (1)/(V)$

where

p is the pressure of the gas

V is its volume

The equation can be rewritten as

$p_1 V_1 = p_2 V_2$

where in this problem:

$p_1=99.0 kPa$ is the initial pressure

$V_1=300.0 mL$ is the initial volume

$p_2=188 kPa$ is the final pressure

Solving for V2, we find the final volume:

$V_2=(p_1 V_1)/(p_2)=((99.0)(300.0))/(188)=158.0$ mL

Isotopes called what are used to diagnose disease and to study environmental conditions

Answers

A radioactive tracer, I believe. Someone check that lol.

How are elements identifies in terms of their atoms?

Answers

they are identified by the number of protons they have in the nucleus which = their electrons.

protons,neutrons,electrones,mass number and model are a few.
i hope this helped

What is the difference between refraction and rarefaction?

Answers

The difference between light reflection and refraction is simple. In reflection, the light ray striking the plane returns to the originating source or medium as the waves spring off the surface. in refraction, the waves go through the surface and it alters their speed and direction.

what is reflection?

Reflection is the bouncing back of light when it strikes a smooth surface. Generally occurs on shinny surfaces that only allow rebounding of light without permitting penetration through it. In this process, light bounces back and returns back in the same direction.

Refraction is the bending of light rays when it travels from one medium to another. This occurs in transparent surfaces that allow bending of the ray to a different medium.

In this process, light changes path i.e travels from one medium to another.

To know more about Refraction, click on link.

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What is the difference between refraction and rarefaction?

Refraction occurs when a wave crosses a boundary from one medium to another. A wave entering from an angle will change direction

Rarefraction refers to the "bending of wavelengths around an edge"of an object. diffraction depends on the size of the object relative to the wavelength of the waves.

Can you put this in order from least to greatest for me

{335 B.C. 430 B.C. 400 B.C.}

Answers

First it's 335 B.C. , next it's 400 B.C. , then lastly it's 430 B.C.

The same way you put this in order from "least to greatest" ... It's just like Mathematics terms of "least to greatest" .. Just with 'B.C.' added to it

Al2(SO4)3 + BaCl2 balanced equation