Lithium has 1 valence electron available for bonding. So its A.
Answer choice A, B, and C is right about the valence electrons. For answer choice D and E, Would in it be a more of an element kind of choice. whether the element is closer to the left side of the periodic table or not determines the high and low energy.
Answer:
c) acidic
Explanation:
pKa is a value which describes the acidity of a solution. The solution is pKa ≤ 25 which means that the solution is more acidic. The lower value of pKa tells us that the solution is more acidic but when the pKa value of solution increases the acidity of the solution is also decreases. Due to lower value of pKa, the acid in the solution is fully dissociates in water.-5 to 50 is the range of the value of pKa for different solutions.
Answer:
0.00725 M
Explanation:
Considering for 
Mass = 5.66 g
Molar mass of
= 80.043 g/mol
Moles = Mass taken / Molar mass
So,
<u>Moles = 5.66 / 80.043 moles = 0.0707 moles</u>
will dissociate as:
Thus 1 mole of
yields 1 mole of ammonium ions. So,
<u>Ammonium ions furnished by
= 1 × 0.0707 moles = 0.0707 moles</u>
Considering for 
Mass = 4.42 g
Molar mass of
= 149.09 g/mol
Moles = Mass taken / Molar mass
So,
Moles = 4.42 / 149.09 moles = 0.0296 moles
will dissociate as:
Thus 1 mole of
yields 3 moles of ammonium ions. So,
<u>Ammonium ions furnished by
= 3 × 0.0296 moles = 0.0888 moles</u>
<u>Total moles of the ammonium ions = 0.0707 + 0.0888 moles = 0.1595 moles</u>
Given that:
Volume = 22.0 L
So, Molarity of the
is:
<u>Molarity = Moles / Volume = 0.1595 / 22 M = 0.00725 M</u>