1a) anion and S-2
1b) cation and Al+3
1c) anion and N-3
1d) cation and Ca+2
<u>Answer:</u> The number of moles of strontium bicarbonate is
<u>Explanation:</u>
Formula units are defined as lowest whole number ratio of ions in an ionic compound. It is calculate by multiplying the number of moles by Avogadro's number which is
We are given:
Number of formula units of
As, number of formula units are contained in 1 mole of a substance.
So, number of formula units will be contained in = of strontium bicarbonate.
Hence, the number of moles of strontium bicarbonate is
Answer: The standard free energy change for a reaction in an electrolytic cell is always positive.
Explanation:
Electrolytic cells use electric currents to drive a non-spontaneous reaction forward.
Relation of standard free energy change and emf of cell
where,
= standard free energy change
n= no of electrons gained or lost
F= faraday's constant
= standard emf
= standard emf = -ve , for non spontaneous reaction
Thus
Thus standard free energy change for a reaction in an electrolytic cell is always positive.
Answer:
Tryptophan is an essential amino acid.