Answer:
E cell = +1.95 V
Explanation:
At Anode : Oxidation reaction takes place
At Cathode : Reduction reaction takes place
The reaction with lower value of reduction potential will undergo Oxidation
E = -1.18 V
This equation undergo oxidation reaction and become:
Anode(Oxidation-Half) :
E = +1.18 V
Cathode(Reduction-Half) :
E =+0.77 V
To balance the reaction multiply reduction-Half with 2.We get :
Note that E is intensive property , do not multiply E of oxidation-half with 2
Ecell = 0.77 -(-1.18)
E = +1.95 V
0.645L * 0.410 mol KBr / 1 L = mol KBr
Answer:
The final temperature of the iron is 95.86 °C
Explanation:
To solve the question we must first find out the specific heat of iron which is 0.450 J/g°C
Then we list out the known variables
Initialtemperature = 38 °C
Applied heat = 2213 joules
Mass of sample = 85 g
Therefore, the required formula relating the final temperature of the iron to the known variables is
ΔH = m·C·Δθ where ΔH = applied heat, m = mass, C = specific heat capacity
plugging in the values we have
2213 J = 85 g×0.450 J/g° C× (T₂ - 38 °C), where T₂ = The final temperature of the iron
2213 J - 1453.5 J = 38.25 × T₂ or T₂ = 95.86 °C
The final temperature of the iron is 95.86 °C
Answer:
1+1=2 and 2+2=4
Explanation:
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Answer:
D) The carbon in the carboxylic acid is sp2 hybridized and has a higher percent s-character that shortens the C-O bond in the carboxylic acid.
Explanation:
The central carbon atom in acetic acid posses sp2 hybridization and the central carbon atom in ethanol posses sp3 hybridization. As the percent s-character in sp2 hybridized carbon atom is 33% whereas in sp3 hybridized carbon atom ther percent s-character is 25%. Higher is the s-character higher is the electronegativity and stronger is the tendency to pull shared pair of electron towards itself and thus, making the bond shorten and stronger. Thus, the carbon-oxygen single bond in acetic acid becomes short due to sp2 hybridization.
Therefore, option (D) is correct that the carbon in the carboxylic acid is sp2 hybridized and has a higher percent s-character that shortens the C-O bond.
See attachment for the chemical formula
