What is wrong with the statement "this rock weighs 8 kilograms"
2 answers:
Answer: The unit of weight is Newtons.
Explanation:
Mass of an object is the amount of matter contained in the body. It is measured in units of g, kg and mg.
Weight of an object is the force acting on an object by virtue of its mass.
weight=
m = mass
g= acceleration due to gravity
Putting in the values we get,
weight=
Thus weight is expressed in units of Newton in S.I system.
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Answer:
2.01V ( To three significant digits)
Explanation:
First we show the standard reduction potentials of Cu2+(aq)/Cu(s) system and Al3+(aq)/Al(s) system. We can clearly see from the balanced redox reaction equation that aluminium is the anode and was the oxidized specie while copper is the cathode and was the reduced specie. This observation is necessary when substituting values of concentration into the Nernst equation.
The next thing to do is to obtain the standard cell potential as shown in the image attached and subsequently substitute values of concentration and standard cell potential into the Nernst equation as shown. This gives the cell potential under the given conditions.
