Answer:
a and d
Explanation: bc if c is wrong and b is to trust me
Answer:
Ba
Explanation:
Magnesium is the element of second group and third period. The electronic configuration of magnesium is - 2, 8, 2 or
There are 2 valence electrons of magnesium.
Fluorine is the element of seventeenth group and second period. The electronic configuration of fluorine is - 2, 7 or
There is 1 valence electron of fluorine.
They will combine and form
<u>The same type of compound is formed by the other members of the group 2 since they will have 2 valence electron.</u>
Group 2 includes:- beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Hence, correct options is:- Ba
The correct answer for the question above is S2- (Sulfide.) S2- ion was formed by providing the second ionization energy to remove an electron. S2- is actually an inorganic anion of Sulfur. This anion contributes no color to any objects and is classified as a strong base.
Air is the most simplest mixture of gas and gas. It contains oxygen, CO2, nitrogen, etc.
1. 9.36 moles S
2. 0.213 moles Al
<h3>Further explanation</h3>
Given
Reaction
2Al+3S⇒Al₂S₃
Required
moles of S
moles of Al
Solution
The reaction coefficient in a chemical equation shows the mole ratio of the compounds involved in the reaction (reactants or products)
From equation, mol ratio of Al₂S₃ : S = 1 : 3, so mol S :
= 3/1 x mol Al₂S₃
= 3/1 x 3.12
= 9.36 moles S
From equation, mol ratio of Al : S = 2 : 3, so mol Al :
= 2/3 x mol S
= 2/3 x 0.32
= 0.213 moles Al