Answer:Well-known examples are sodium hydroxide (NaOH) with OH- as the polyatomic anion, calcium carbonate (CaCO3), and ammonium nitrate (NH4NO3), which contains two polyatomic ions: NH+ and NO3-. ... The properties of compounds containing polyatomic ions are very similar to those of binary ionic compounds.
Explanation:
Answer: Exothermic.
Explanation:
Exo means “outside” and the outside relates to surroundings so it’s my best choice.
Answer:
M2(So4)2
Explanation:
Here,
The symbol of metal is M and the symbol of sulphate is So4.
And the,
Valency of metal is 3 and the valency of sulphate is 2..
SO,
M So4
3 2
And when we cross multiply it the formula will be,
M2(So4)2
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Answer:
When you bake a cake the smell changes after it has been baked and it counts as a chemical change
Explanation:
How would you calculate the change in entropy when the pressure of a perfect gas is changed isothermally from P_i to P_f
Answer:
ΔS = nRIn(P_i/P_f)
Explanation:
Formula for entropy change is;
ΔS = nC_p•In(T_f/T_i) + nRIn(P_i/P_f)
Since the pressure of the perfect gas is changed isothermally, it means that temperature remains the same and as such T_f = T_i
Thus, we now have;
ΔS = nC_p•In(1) + nRIn(P_i/P_f)
In(1) = 0
Thus;
ΔS = nRIn(P_i/P_f)