Examples of energy being used around your class room
Answers
The statement, that describes the energy being used around your class room is "mechanical energy, heat energy, light energy and sound energy."
What is energy?
Energy is defined by scientists as the ability to perform tasks. Energy is described as the "capacity to accomplish work, which is the ability to apply a force that causes an object to move." It can be potential, kinetic, thermal, electrical, chemical, nuclear, or other. Computers, smart boards, overhead projection machines, lighting, and fans are used in the classroom.
Electrical energy is converted into mechanical energy by an electric fan.
The transfer of charge through the filament in the tubelight heats it up and causes it to glow. The tubelight transforms electrical energy to heat energy and light energy in this manner. When you switch on your computer, electrical energy is converted into sound and light energy. When the computer is turned on, electrical energy is converted to thermal energy.
Hence the correct answer is mechanical energy, heat energy, light energy and sound energy.
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Which substance does the chemical formula C6H12O6 represent?simple sugar, water, table salt, or carbon dioxide Please answer quick!!!
Correct name for LiCl
What is the charge on an electron?
If i walk 25 steps north than 75 steps south, what is my final position
A)2014
B)Cl2
C)Mg
D)Mg2+
Answers
The metal loses electrons, and when it becomes Mg2+, it loses two electrons, becoming oxidized. So, the correct option is D.
What is Oxidation reaction?
Initially, the word "oxidation" was used to refer to chemical processes in which a component reacts with oxygen. An illustration of this is the oxidation of magnesium in the formation of magnesium oxide when magnesium and oxygen react.
Antoine Lavoisier used the term "oxidation" to describe the reaction of a material with oxygen. The meaning was later expanded to cover additional reactions in which electron are lost, irrespective of whether oxygen was present, after it was realised that the substance loses electrons when it is oxidised.
In the aforementioned example, the metal loses electrons; specifically, it loses two electrons as it changes from Mg+ to Mg2+, getting oxidized.
Therefore, the correct option is D
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Answer:
Mg ²⁺
Explanation:
Τhe metal loses electrons and in forming Mg²⁺ ,it loses 2 electrons and hence oxidized.
Mg(s) ⇒ Mg²⁺ + 2e⁻
b. change in mass
c. physical change
d. endothermic change
Answers
- This wouldn't be a physical change, but instead a chemical change. A clue that it is a chemical change is that energy was given off.
the answer is A exothermic change
0.23 mol
Ob
0.38 mol
0.28 mol
Od
0.47 mol
Answers
Answer:
0.23 mol
Explanation:
to the nearest hundredth?
Answers
Answers
We are given with the mass of Arsine (
The mass of arsine is 15g
there is a relation between moles, mass and molar mass of any compound which is
The molar mass of Arsine = atomic mass of As + 3X atomic mass of H
the molar mass of Arsine = 74.92 + 3X 1 = 77.92 g/mol
Let us calculate the moles as
Answers
The subscript 2 on the Bromine, Br atom simply means Magnesium ion is; Mg²+.
Discussion:
When magnesium ion, Mg²+ combines with an halogen like Bromine, Br-.
In such scenario, there must be a balance of charges for the formation of a compound like MgBr2.
As such, 2 Br- ions and 1 Mg²+ are necessary to maintain charge balance in the compound.
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Final answer:
The '2' in Magnesium bromide (MgBr2) represents the 2 bromide ions that associate with each magnesium ion in the ionic compound, ensuring overall neutrality.
Explanation:
In the ionic compound Magnesium bromide (MgBr2), the '2' signifies the number of bromine (Br) atoms that are combined with a single atom of Magnesium (Mg) to form this compound. This is due to the fact that magnesium (Mg) has two valence electrons which it donates to form a stable compound, resulting in a Mg2+ cation. The bromine atom accepts one electron to form a Br- anion. Since Mg needs to donate two electrons, two Br ions are required, which gives us the '2' in MgBr2. This ratio of ions ensures neutrality of the overall ionic compound.
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