Answer:-
0.91% is the students % of error
Explanation: -
Accepted value= 12.11 grams
Measured value = 12.22 grams
Error = 12.22-12.11 = 0.11 grams
Percentage error = x100
= 0.91 %
Thus 0.91% is the students % of error
The CN– ion is widely used in the synthesis of organic compounds. What is the pattern of electron pairs in this ion? How many bo
nding pair(s) of electrons? How many lone pair(s) on the carbon atom? How many lone pair(s) on the nitrogen atom?
1 answer:
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Answer:
Kinetic energy of boy just before hitting the ground is 1000 J.
Speed of boy just before hitting the ground is 7.67 m/s
or 17.16 mi/hr.
Explanation:
Given that:
Mass of boy = 75lb = 34 kg
Height, h = 10ft = 3m
To find:
Kinetic energy of boy when he hits the ground.
<em>As per law of conservation of energy The potential energy gets converted to kinetic energy.</em>
<em></em>
<em></em><em> </em>Kinetic energy at the time boy hits the ground = Initial potential energy of the boy when he was at the Height 'h'
The formula for potential energy is given as:
Where m is the mass
g is the acceleration due to gravity, g = 9.8
h is the height of object
Putting all the values:
PE =
Hence, Kinetic energy is 1000 J.
Formula for Kinetic energy is:
where m is the mass and
v is the speed
Putting the values and finding v:
Given that:
1 m = 1.094 yd and 1 mi = 1760 yd
Converting 7.67 m/s to miles/hour:
I first converted the given grams of the reactants into moles, and then divided the moles by the coefficients in front of each of the reactant. The result with the smallest value will be the limiting reactant, and the value of CuO was the smallest, so it's the limiting reactant.
After figuring out which reactant is the limiting one, I took their given grams and converted it into moles, the divided it by the ratio of N2 to CuO (it's in the equation) to obtain the moles of N2, and then multiply it with the molar mass of N2 to get its mass in grams.
