Hey guys need help with this!!
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only one (the answer is B) any carbon with a double bond or two similar groups like CH2 cant be chiral. so the only one is the CH with the benzene ring attached to it.
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Hey guys need help with this!!
View attachment 8916
I don't see any..Hey guys need help with this!!
View attachment 8916
solved... thxxxyou still have this problem or its solved now...???
aoa wr wb!Hey guys need help with this!!
View attachment 8916
answer?Hey guys need help with this!!
View attachment 8916
since the enthalpy change of formation of 2 moles of iron(III) oxide is -1648 the standard enthalpy change of formation of 1 mole of iron(III) oxide will be the half which is BSkiers trapped by snowstorms use heat packs to keep warm. The heat may be generated by the
reaction below.
4Fe(s) + 3O2(g) → 2Fe2O3(s) ; ∆HO = –1648kJ
What is the standard enthalpy change of formation of iron(III) oxide?
A 0kJmol–1
B –824kJmol–1
C –1648kJmol–1
D –3296kJmol–1
helppppppppppppppppppppppppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
oh my gosh,you explained it so well! Thankyou!!!!Oxidation no. of N is -3.
Oxidation no. of H is +1.
Oxidation no. of O is -2.
Sum of oxidation no.s in a compound must equal zero.
When you calculate it, C is the only option.
Because, look:
NH4ClO4 -> -3+4+x-8=0
-> 1+x-8=0
-> -7+x=0
->x=7
Skiers trapped by snowstorms use heat packs to keep warm. The heat may be generated by the
reaction below.
4Fe(s) + 3O2(g) → 2Fe2O3(s) ; ∆HO = –1648kJ
What is the standard enthalpy change of formation of iron(III) oxide?
A 0kJmol–1
B –824kJmol–1
C –1648kJmol–1
D –3296kJmol–1
helppppppppppppppppppppppppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
OMG thank u sooooooooooooooooooooo freaking much!since the enthalpy change of formation of 2 moles of iron(III) oxide is -1648 the standard enthalpy change of formation of 1 mole of iron(III) oxide will be the half which is B
http://www.xtremepapers.com/CIE/International A And AS Level/9701 - Chemistry/9701_w06_qp_1.pdf
question 9 Plzzz......
thnks in advnce....
delta H thetaWhat on Earth is "∆HO"?
delta H theta
Ah, okay.
Yup its correctI think the answer is C. Check in marking scheme if this is correct. If so, I'll explain what I did.
no problemOMG thank u sooooooooooooooooooooo freaking much!
Yup its correct
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