Cysteine and methionine contain sulfur.
Answer:
D. 0.543kg of copper metal is produced from 0.680kg of copper 1 sulphide.
Explanation:
First write the equation for the reaction:
Cu2S + O2 ------> 2Cu + SO2
Determine the mole ratio of the two substances:
I mole of Cu2O forms 2 moles of Copper metal
The number of moles of copper 1 sulphide used is;
n = mass of Cu2S / molar mass of Cu2S
Mass = 0.680kg = 680g
Molar mass = 159.16g/mol
n = 680g / 159.16g/mol
n = 4.272moles
Determine the number of mole of copper:
Number of moles of copper metal produced from 4.272moles of copper 1 sulphide is therefore:
n of copper = 2 * 4.272 Moles
n = 8.544moles.
Determine the mass copper:
The mass of copper metal produced is therefore = number of moles of copper * molar mass of copper
mass = 8.544 moles * 63.55g/mol
mass = 542.97grams
Mass = 0.543kg
False
The water is more buoyant which means the water has more of a tendency to float than the duck.
Answer:
Following are the answer to this question:
Explanation:
The most stable carbocation is: 
- The means of is a hydrocarbon with
, which is needed to find the double bonds.
- The formula for calculating the unsaturation hydrocarbons are:
Degree of the unsaturation
Where,
C=9, N=0, X=0, H=12
which means 3 double bonds and 1 ring.
- The most stable carbocation is given in the attachment file. please find the attachment.
Answer:
Explanation:
molar volume=moles*given volume
for molar concentration we use two formulas molarity and molality
molarity=no of moles/volume
molality=no of moles/kilogram
