1 mol CuSO₄·5H₂O ----------- 5 mol H₂O
0,25 mol CuSO₄·5H₂O ---- Xmol H₂O
X = 5×0,25 = 1,25 mol H₂O
Answer:
Ozone layer depletion increases the amount of UVB that reaches the Earth's surface. Laboratory and epidemiological studies demonstrate that UVB causes non-melanoma skin cancer and plays a major role in malignant melanoma development
Explanation:
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Answer:
A and D are true , while B and F statements are false.
Explanation:
A) True. Since the standard gibbs free energy is
ΔG = ΔG⁰ + RT*ln Q
where Q= [P1]ᵃ.../([R1]ᵇ...) , representing the ratio of the product of concentration of chemical reaction products P and the product of concentration of chemical reaction reactants R
when the system reaches equilibrium ΔG=0 and Q=Keq
0 = ΔG⁰ + RT*ln Q → ΔG⁰ = (-RT*ln Keq)
therefore the first equation also can be expressed as
ΔG = RT*ln (Q/Keq)
thus the standard gibbs free energy can be determined using Keq
B) False. ΔG⁰ represents the change of free energy under standard conditions . Nevertheless , it will give us a clue about the ΔG around the standard conditions .For example if ΔG⁰>>0 then is likely that ΔG>0 ( from the first equation) if the temperature or concentration changes are not very distant from the standard conditions
C) False. From the equation presented
ΔG⁰ = (-RT*ln Keq)
ΔG⁰>0 if Keq<1 and ΔG⁰<0 if Keq>1
for example, for a reversible reaction ΔG⁰ will be <0 for forward or reverse reaction and the ΔG⁰ will be >0 for the other one ( reverse or forward reaction)
D) True. Standard conditions refer to
T= 298 K
pH= 7
P= 1 atm
C= 1 M for all reactants
Water = 55.6 M
Best Answer: <span>We would write the molecular equation as ....
BaCl2(s) + H2SO4(aq) --> BaSO4(s) + 2HCl(aq)
You would write the ionic equation as....
BaCl2(s) + H+ + HSO4^- --> BaSO4(s) + 2H+ + 2Cl-
remove the H+ from both sides and write the net ionic equation as.....
BaCl2(s) + HSO4^- --> BaSO4(s) + H+ + 2Cl-
If you placed BaCl2 solid in sulfuric acid it would quickly acquire a coating of insoluble BaSO4 which will prevent the further reaction of the barium chloride.
The same is true if you took a block of BaCl2 and placed a drop of H2SO4 solution on it. The solid BaSO4 that forms will block further reaction. You would get HCl gas only if the small amount of solution became saturated in HCl.</span><span>
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Answer:
Last option is the correct choice.
Explanation:
Number of protons = 60-33 = 27
Superscript 60 Subscript 27 upper C o.
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