1. A mole or fraction of a mole represents a specific or nonspecific number of atoms or molecules.
I chose nonspecific but I'm not sure if it's right.
2. Match the factors which affect the rate of dissolving/dissociation.
a) increased surface area
b) like polarity increases rate
c) temperature
d) stirring
MATCH WITH:
e) rate proportional to K.E.
f) finely divided solute
g) concentration decreases around solute
h) matching solvent and solute
I keep trying to match them but I'm so unsure! :(
3. Which expression(s) define molarity?
a) #moles/liter solution
b) #mole solute/#mole solution
c) #moles x liters of solution
d) #moles/ liter (solvent)
I thought the answer was #moles of solvent/ liters of solution but that's not an answer so I must be wrong.
4. The ion product of water:
a) varies with pH
b) is only applicable to neutral water
c) remains constant regardless of the pH
d) ranges between 1.0 and 10^-14
I think the answer is a) varies with pH ?
5. Reaction (ex. Zn--> 2e+Zn2 or the left side of the answers) E0 (ex.0.76- the right side)
Zn → 2e- + Zn2+ 0.76
2F- → 2e- + F2 -2.87
F2 + Zn → ZnF2
Will this redox reaction take place? yes or no
6. AlCl3 + Na --> NaCl + Al (reversible reaction)
Did Cl change oxidation number?
yes or no? I think... okay I don't know please help! :P
Thank you so much for your time and answers, I really appreciate them all very much. Chemistry is not my forte :P Thank you so much! Have a wonderful day! :)
I chose nonspecific but I'm not sure if it's right.
2. Match the factors which affect the rate of dissolving/dissociation.
a) increased surface area
b) like polarity increases rate
c) temperature
d) stirring
MATCH WITH:
e) rate proportional to K.E.
f) finely divided solute
g) concentration decreases around solute
h) matching solvent and solute
I keep trying to match them but I'm so unsure! :(
3. Which expression(s) define molarity?
a) #moles/liter solution
b) #mole solute/#mole solution
c) #moles x liters of solution
d) #moles/ liter (solvent)
I thought the answer was #moles of solvent/ liters of solution but that's not an answer so I must be wrong.
4. The ion product of water:
a) varies with pH
b) is only applicable to neutral water
c) remains constant regardless of the pH
d) ranges between 1.0 and 10^-14
I think the answer is a) varies with pH ?
5. Reaction (ex. Zn--> 2e+Zn2 or the left side of the answers) E0 (ex.0.76- the right side)
Zn → 2e- + Zn2+ 0.76
2F- → 2e- + F2 -2.87
F2 + Zn → ZnF2
Will this redox reaction take place? yes or no
6. AlCl3 + Na --> NaCl + Al (reversible reaction)
Did Cl change oxidation number?
yes or no? I think... okay I don't know please help! :P
Thank you so much for your time and answers, I really appreciate them all very much. Chemistry is not my forte :P Thank you so much! Have a wonderful day! :)
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Well you are cute (that probably isn't even your pic) so I'll give it a shot.
1 Moles are just a group number of something i.e. 12 is a dozen a mole is 6.023 x 10^23 which are specific numbers so its a specific numbering.
2 A-G B-H C-E D-F
3 D moles / liter solvent.....the alternative solution is what reults
4 A
5 Add both sides together to get the overal potential of the reaction....
0.76 + -2.87 = -2.11 Since delta G = - nfe a negative times a negative e would give a positive delta G for a reaction. Generally reactions are spontaneous if delta G is negative. So NO.
6 Cl did not change oxiation number because it formed a salt ( an ion pair) with Na+. There is some redox chemistry going on there since you a getting Al (solid) from Al+3. So the answer is no.
1 Moles are just a group number of something i.e. 12 is a dozen a mole is 6.023 x 10^23 which are specific numbers so its a specific numbering.
2 A-G B-H C-E D-F
3 D moles / liter solvent.....the alternative solution is what reults
4 A
5 Add both sides together to get the overal potential of the reaction....
0.76 + -2.87 = -2.11 Since delta G = - nfe a negative times a negative e would give a positive delta G for a reaction. Generally reactions are spontaneous if delta G is negative. So NO.
6 Cl did not change oxiation number because it formed a salt ( an ion pair) with Na+. There is some redox chemistry going on there since you a getting Al (solid) from Al+3. So the answer is no.