During the big band only the lightest elements were formed – hydrogen<span> and </span>helium<span> along with trace amounts of </span>lithium<span> and </span>beryllium<span>.</span>
Answer:
she use granulated sugar with fine grains as it is easily dissolved so she used in lemonade.
Answer:
E) NaF and SrO
Explanation:
The ionic bonding occurs between atoms with a great difference in electronegativity. This usually happens between a metal and a non-metal.
<em>In which pair do both compounds exhibit predominantly ionic bonding? </em>
A) KCl and CO₂. NO. C and O are non-metals and present covalent bonding.
B) SO₂ and BaF₂. NO. S and O are non-metals and present covalent bonding.
C) F₂ and N₂O. NO. Both compounds contain non-metals and present covalent bonding.
D) N₂O₃ and Rb₂O. NO. N and O are non-metals and present covalent bonding.
E) NaF and SrO. YES. Na and Sr are metals while F and O are non-metals.
Answer:
b. Ag ( s )
d. Ni ( s )
= 2.97 V
Explanation:
The reduction potentials for the given four (4) electrodes are:
In the first cell:
In the second cell:
Since the cells are connected in series :
Thus; Metal plated in the first cell = Ag
Metal plated in the second cell = Ni
The total potential =
= (0.80 + 1.66 ) V - (0.25 +0.76 ) V
= 2.97 V
Buffer is something which maintains its own pH against acids and bases which poured very shortly on them.So it resists the pH going up and down.
It also maintains a solution in a neutral pH.