is this statement correct, explain your reasoning: The amount of chemical energy in a flashlight's battery is equal to the light energy it emits to the environment.
Answers
The amount of energy when it is transformed from one form to another is still the same or equal.
The law of conservation of energy states energy cannot be destroyed nor created. Instead, it just transform from one form to another.
There are different types of energy. They are:
1) Chemical Energy
2) Mechanical Energy
a) Kinetic energy
b) Potential energy
i. gravitational potential energy
ii. elastic potential energy
3) Electrical Energy
4) Nuclear Energy
Chemical Energy can transform to thermal energy or electrical energy.
Mechanical Energy can transform to electrical energy
Answer:
what they said
Explanation:
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2.pahoehoe
3.friction
4.viscosity
5.element
6.silicia
7.compound
8.carbon
Answers
Correct answer choice is:
3) Friction
Explanation:
Low viscosity relates to materials that are thin, such as water, while high viscosity materials are thick. The viscosity of a fluid is a sum of its opposition to progressive deformation by shear strain or tensile stress. For liquids, it compares to the simple idea of thickness, for example, honey has a very greater viscosity than water.
Answer:
Option (3)
Explanation:
The magma that is comprised of low silica content is termed as low viscosity magma. By low viscosity magma, it means that the magma can easily flow over the surface, without any difficulty. This indicates that there is less friction between the surface and the flowing magma. Friction usually refers to the resistant force that obstructs the flow of a liquid in any direction.
When there is a high frictional force, then the liquid flows very slowly with much difficulty. On the other hand, when there is a low force of friction, then the liquid can flow easily over a surface.
Thus, in a low viscosity magma, there is low silica content, so there is less frictional force between the surface and the magma, and the magma flows easily over the surface.
Hence, the correct answer is option (3).
Answers
The water would just spread out on the table mainly because of van der waal forces, but it would stop eventually because of surface tensile forces.
What is surface tension?
Surface tension is a force which tends to maintain the tension in water surface due to surface tension insects moves on the surface of water. It is a force which act in outward direction. S.I unit of surface tension is Newton-meter.
Surface tension is a physical quantity which is vector quantity i.e it has both magnitude and direction.
Mathematically,
Surface tension is reciprocal of force per unit length it means that force which act in a one meter length is called surface tension.
Force is defined as a phenomena which try to displace any object or it try to move an object from one point to another point. S.I unit of force is Newton. It is vector quantity i.e it has a both magnitude and direction.
Therefore,The water would just spread out on the table mainly because of van der waal forces, but it would stop eventually because of surface tensile forces.
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Answer:
0.01M
Explanation:
Given paramters:
Volume of FeCl₂ = ?
Concentration = 0.945M
Number of molecules of O₂ = 4.32 x 10²¹molecules
Solution:
The balanced reaction equation is given below:
4FeCl₂ + 3O₂ → 2Fe₂O₃ + 4Cl₂
Now, to solve the problem we use mole relationship between the compounds.
We work from the known to the unknown compounds. Here, the known is the oxygen gas because from the given parameters we can estimate the number of moles of the reacting gas.
number of moles of O₂ =
number of moles of O₂ =
number of moles of O₂ = 0.007mole
now, from the reaction equation we find the number of moles of the FeCl₂:
3 mole of O₂ reacted with 4 moles of FeCl₂
0.007mole of O₂ reacted with = 0.0096mole O₂
Now to find the volume of FeCl₂ we use the expression below;
volume of FeCl₂ =
=
= 0.01L
Final answer:
10.1 milliliters of 0.945 M solution of FeCl2 are required to react completely with 4.32 x10^21 molecules of O2.
Explanation:
Given the balanced chemical equation: 4FeCl2(aq) + 3O2(g) → 2Fe2O3(s) + 4Cl2(g) we know that 4 moles of FeCl2 react with 3 moles of O2. Avogadro's number (6.02 x 10^23) can be used to convert the given molecules of O2 into moles: 4.32 x 10^21 molecules of O2 is equal to 0.00718 Moles of O2.
Using stoichiometry and the molar ratio from the balanced equation, this amount of O2 would react completely with 0.00958 Moles of FeCl2. Given that the solution is 0.945 M (moles/liter), we can calculate the necessary volume of FeCl2 solution:
Volume = Moles / Molarity, therefore, Volume = 0.00958 Moles / 0.945 M = 0.0101 liters or 10.1 milliliters of 0.945 M solution of FeCl2 are required to react completely with 4.32 x10^21 molecules of O2.
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Hope This helps!
Andres2003