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Salsk061 [2.6K]
3 years ago
15

Argon-40 undergoes positron emission as shown:

Chemistry
1 answer:
Rudik [331]3 years ago
3 0

Answer:

\frac{40}{18}Ar => \frac{40}{17}Cl + \frac{0}{1}e\\

Explanation:

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Identify which sets of Quantum Numbers are valid for an electron. Each set is ordered (n,ℓ,mℓ,ms).
skad [1K]

3,2,0,1/2

1,0,0,1/2

3,2,2,1/2

4,2,1,1/2

2,1,-1,-1/2

THEY ARE VALID


3 0
3 years ago
Which of the following statements is not true of the phases of a given substance ?
velikii [3]

The particles of gases have more kinetic energy than liquids and gases.

Explanation:

  • We know that in case of solids the molecules are very tightly packed , in case of liquids the molecules are loosely packed and lastly in case of gases the molecules are very loosely packed.
  • As we known in case of solids energy present is very less and in case of liquids energy present is more than solids and lastly in case of gases the energy present is most.
  • Gases have more kinetic energy because the particles present in gaseous form can move easily without any obstruction.
3 0
3 years ago
Is methylene chloride more or less dense than water?
horsena [70]
Methylene chloride is less dense than water
3 0
3 years ago
A potential energy diagram is shown. What is the total change in enthalpy of this reaction? 25 kJ 30 kJ 35 kJ 55 kJ
Kazeer [188]

Answer : The total change in enthalpy of this reaction is 25 kJ.

Explanation :

Enthalpy of reaction : It is defined as the changes in heat energy takes place when reactants go to products. It is denotes as .

ΔH = Energy of product - Energy of reactant

ΔH is positive when heat is absorbed and the reaction is endothermic.

ΔH is negative when heat is released and the reaction is exothermic.

In the given potential energy diagram, the energy of product at higher level and energy of reactant at lower level. The ΔH for this reaction will be positive.

Given:

Energy of product = 55 kJ

Energy of reactant = 30 kJ

ΔH = Energy of product - Energy of reactant

ΔH = 55 kJ - 30 kJ

ΔH = 25 kJ

Thus, the total change in enthalpy of this reaction is 25 kJ.

5 0
3 years ago
A salt bridge: Question 3 options: provide a pathway through which the electrons travel from the cathode to the anode. provide a
Vesnalui [34]

Answer:

The correct option is: provide a source of counterions to prevent the build-up of charge at both the cathode to the anode.

Explanation:

A salt bridge is a U-shaped glass tube that is used in a voltaic cell or galvanic cell to connect the oxidation and reduction half-cells and complete the electric circuit.

<em>It allows the ions to pass through it, thus preventing the accumulation of charge on the anode and cathode as the chemical reaction proceeds.</em>

<u />

Therefore, the correct option is: <u>provide a source of counterions to prevent the build-up of charge at both the cathode to the anode.</u>

5 0
3 years ago
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