Answer & Explanation:
D orbitals begin filling with electrons after the orbital found in the 4s sublevel is filled. This occurs because the d sublevel is first found in the.
1) <span>Chemical reactions are always spontaneous when CHANGE IN H is negative and CHANGE IN S is negative</span>False
2)The driving force of a reaction is the change in kinetic energy.
True
3) In the reaction so2cl2 double arrows s02+cl2 heat is evolved. What happens when chlorine (Cl2) is added to the equilibrium mixture at constant volume?
b. The temperature of the system decreases.
4) In a reversible reaction, two substances are in equilibrium if the concentration of each increases by the same amount but the equilibrium constant remains unaffected.
True
5) A numerical value of the ratio of products to reactants, only at a specified temperature is called a(n)
b. equilibrium constant
6)At equilibrium,
a. all reactions have ceased.
The properties of noble gases include:
- They are nonreactive
- They have hight ionisation energy
- They have low boiling point
- They conduct electricity at low pressure.
The noble gases are those elements that makes up the group 18 of the periodic table.
They are non as the inert gases because they are relatively nonreactive.
According to the electronic arrangement, which is according to how the electrons are arranged on their shells, they can exist alone.
The noble gases are nonreactive, have high ionisation energy and low boiling point because in its electronic arrangement, the outer shell is completely full.
Learn more here:
brainly.com/question/19874646
Answer:
3.0002 moles
Explanation:
Data Given:
mass of NO₂ = 138.01 g
No. of moles NO₂ = ?
Solution
To find mass of sample mole formula will be used
mole formula
no. of mole = mass in grams / molar mass
Molar mass of NO₂ = 14 + 2(16)
Molar mass of NO₂ = 14 + 32 = 46 g/mol
Put values in above equation
no. of mole = 138.01 g / 46 g/mol
no. of mole = 3.0002 moles
no. of mole of NO₂ = 3.0002 moles
Group 16 must gain 2 electrons to become stable as stated in my other answer
Hope this helped
