Answer:
-The mole is appropriate only for counting things that are very small.
-One mole is a very large number of something.
-A molecule of water is much smaller than a grain of sand.
Explanation:
Theoretical Yield is an Ideal yield with 100 % conversion of reactant to product. It is in fact a paper work.
While,
Actual Yield is the yield which is obtained experimentally. It is always less than theoretical yield because it is not possible to have 100% conversion of reactants into products. Even some amount of product is lost while handling it during the process.
Percentage Yield is Calculated as,
%age Yield = Actual Yield / Theoretical Yield × 100
Data Given:
Actual Yield = 0.104 g
Theoretical Yield = 0.110 g
Putting Values,
%age Yield = 0.104 g / 0.110 g × 100
%age Yield = 94.54 %
Answer:
a generator that allows them to convert kinetic energy into potential energy
Explanation:
Rescue workers can accomplish this by using a generator that allows them to convert kinetic energy into potential energy. Such as a crank generator, with these, they spin a crank with their hands and the generator takes that kinetic energy that is building up through the work that the rescuer is exerting and converts it to potential electric energy that can properly be used to provide energy to the batteries for their equipment. This is what is generally used for situations such as what rescuers go through when there is no electricity around.
Answer:
D
Explanation:
Sweat glands remove waste
The mass of impure 
is 20.7167 g. The decomposition reaction is as follows:
Here, 1 mole of gives 1 mole of MgO.
Molar mass of and MgO is 84.31 g/mol and 40.3044 g/mol respectively.
Converting number of moles in terms of mass,
Here, M is molar mass.
Since, 
Thus, 
On putting the values,
Rearranging,
Or,
...... (1)
Let the mass of impurity be 
and mass of impure is 20.7167 g thus,
...... (2)
Also, mass of impure MgO is 16.8817 g thus,
...... (3)
On comparing equations (2) and (3),
Putting the value of 
in equation (1),
Or,
Or,
Or,
Or,
Thus, magnesium carbonate present in the original sample is 7.35 g.
