To determine the values the total mechanical energy of the
given problem we can first identify the values given
Given are:
<span><span>1.
</span>Kinetic Energy = 5.2 Joules</span>
<span><span>2.
</span>Potential Energy = 3.5 Joules</span>
Solution:
The formula for mechanical energy is
<span><span>
a.
</span>Mechanical energy is total energy of both
kinetic and potential hence,</span>
<span><span>
i.
</span>ME = PE + KE</span>
<span><span>
ii.
</span>ME = 3.5 + 5.2</span>
<span><span>
iii.
</span>ME = 8.7 Joules</span>
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, there are ways to save the forest of third world countries - this includes
1) Creating of forest reserves: Wide areas of land that are still forested can still be preserved and converted to forest reserves which can prevent these areas from being deforested as a result of human activities or industrialization.
2) Government policies: Government can put policies in place to prevent people from embarking on deforestation of certain lands. This is because some parts of the third world countries still rely on wood for cooking and other sources of daily activities.
3) Replanting of deforested areas: Replanting of trees can also help third world countries in saving the forest.
Answer:
boiling point is the physial property of matter
Answer:
a. Theoretical yield = 8.81 g
b. 77 %
Explanation:
We begin from the reaction:
2Fe (s) + 3Cl₂ (g) → 2FeCl₃ (s)
and the excess is the iron, so the limiting reagent is the chlorine.
We convert mass to moles → 5.78 g / 70.90 g/mol = 0.0815 mol
Ratio is 3:2 so we think this:
From 3 moles of chlorine, I can produce 2 moles of Iron (III) chloride
Then 0.0815 moles would produce (0.0815 . 2) /3 = 0.0543 moles
This is the theoretical yield. We convert the moles to mass:
0.0543 mol . 162.2 g /mol = 8.81 g
If the reaction yields 6.79 g of FeCl₃ and the theoretical yield is 8.81 g ,we can obtain the percent yield: (6.79 / 8.81) . 100 = 77 %