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3 years ago

In any redox reaction, the substance that undergoes reduction will

2 answers:

7 0

In any redox reaction, the substance that undergoes reduction will 3) gain electrons and have a decrease in oxidation number.

Lunna [17]3 years ago

3 0

redox reactions deal with the transfer of electrons from one species to another species

redox reactions are made of reduction reactions and oxidation reactions

reduction reactions are when electrons take in electrons and results in a decrease in the oxidation number

oxidation reactions are when electrons give out electrons resulting in an increase in the oxidation number

therefore correct answer for reduction reactions are

(3) gain electrons and have a decrease in oxidation number

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If you had excess chlorine, how many moles of of aluminum chloride could be produced from 25.0 g of aluminum? Express your answe

m_a_m_a [10]

Answer:

A. From 25,0 g of aluminium you will produce 0,927 moles of aluminium chloride

B. From 30,0 g of chlorine gas you will produce: 0,282 moles of aluminium chloride

Explanation:

a. The reaction that you have in this problem is:

3 Cl₂ + 2 Al → 2 AlCl₃

25,0 g of aluminium are:

25,0 ₓ $\frac{1mole}{26,98g}$ = 0,927 moles

As Al:AlCl₃ ratio is 1, from 25,0 g of aluminium you will produce: 0,927 moles of aluminium chloride

b. 30,0 g of chlorine gas are:

30,0 ₓ $\frac{1mole}{70,90g}$ = 0,423 moles of Cl₂

As Cl₂:AlCl₃ ratio is ³/₂:

0,423 moles of Cl₂ ₓ $\frac{2 molesAlCl_3}{3 molesCl_2}$ = 0,282 moles of aluminium chloride

Thus, from 30,0 g of chlorine gas you will produce: 0,282 moles of aluminium chloride

I hope it helps!

5 0

4 years ago

An isotope of an element, atomic number Z, has a mass number 2z+4. How many neutrons are there in the nucleus of the element?

Svet_ta [14]

Answer:

z+4

Explanation:

An isotope of an element, atomic number Z, has a mass number 2z+4. How many neutrons are there in the nucleus of the element?o

protons + neutrons =mass number

z +neutrons = 2z+4

neutrons = 2z+4 - z=z+4 which is the # of neutrons in the nucle

7 0

2 years ago

The concentration of a certain sodium hydroxide solution was determined by using the solution to titrate a sample of potassium h

7nadin3 [17]

Answer:

0.022 M

Explanation:

The molarity is the number of mol solute divided by the volume of solution in liters. Since we are told there is only one acidic hydrogen in KHP the reaction is a 1 to 1 with sodium hydroxide, We then calculate the moles of sodium hydroxide required to react with the moles of KHP and proceed to calculate the molarity of the NaOH solution:

mol KHP: 0.1082 g x 1 mol/204.22 g = 0.00053 mol KHP

0.00053 mol KHP x 1 mol Naoh/1 mol KHP = 0.00053 mol NaOH

Molarity of the solution : 0.00053 mol NaOH / 0.02346 L = 0.022 M

note: The volume of sodium hydroxide needed to be converted to liters by definition of molarity.

4 0

3 years ago

What does a group of atoms joined by chemical bonds create?

bagirrra123 [75]

Answer:

I can say that it is not a compound because I got it wrong

Explanation:

7 0

3 years ago

Read 2 more answers

Match these people to the discoveries or work that they are known for. Galileo developed geocentric theory Aristotle developed h

vfiekz [6]

Answer:

Galileo: "Father of Modern Science."

Aristotle: Geocentric theory." (The planests revolves around the earth.)

Torricelli: Invented the barometer. (An instrument which measures pressure.)

Copernicus: Heliocentric theory. (Aka, the planets revolves around the sun.)

Vesalius: Examined the inner workings of the human body

Newton: Developed law of universal gravitation.

Nightingale: Founded nursing profession.

Celsius: Developed metric temperature scale

I hope this helps! Thanks:)

7 0

3 years ago