Setting for what you wanna do or be and try to achieve your goal try hard.
Gas to solid ( a ) is correct i think
Answer:
Magnesium is in Group 2 (sometimes called Group II or 2A). Since it is in Group 2 it will have 2 valence electrons. When you draw the Lewis structure for Magnesium you'll put two "dots" or valance electrons around the element symbol (Mg).GOOD LESSONS ♡
Answer:
Reaction a will be spontaneous at low temperature
Reaction b will be spontaneous at high temperature
Reaction c will be spontaneous at high temperature
Reaction d will be spontaneous at high temperature
Explanation:
Reaction a is an exothermic with a negative entropy and will act spontaneously at low temperature.
Reaction b, c, and d are endothermic reactions and have positive entropy, they will react spontaneously at high temperatures.