Particles of minerals and other rocks that make up a rock are called______
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5)» A change inmeans that a chemical reaction has occurred.
What kind of chemical reaction is below?AgNO3 + NaCI -> AgCI + NaNO3
What is the empirical formula for P4O10?
What causes photons to be emitted from excited atoms
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Answer:
the more heat the more particle movement i dont think mass has any thing to do with it
Explanation:
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Explanation:
Media reflects the society. It shows the true facts about the society. Media plays a very important role in show casing the injustice or the wrong that is going on in the society. It should report all the matters correctly about the violation that occurred. It should not spread any false news but should show the truth behind any violations. It should also aware people about the cause of the violation and also the consequences of it so not it will not be repeated in the future.
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Answer:
206,265.15 Joules are needed to warm 675 grams of water from 12 degrees Celsius to 85 degrees Celsius.
Explanation:
Between heat and temperature there is a direct proportionality relationship, where the constant of proportionality depends on the substance that constitutes the body. So, the equation that allows you to calculate heat exchanges is:
Q = c * m * ΔT
Where Q is the heat exchanged for a body of mass m, constituted by a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
- Q=?
- c=
- m=675 g
- ΔT=Tfinal-Tinitial=85 degrees Celsius - 12 degrees Celsius= 73 degrees Celsius.
Replacing:
Resolving you get:
Q=206,265.15 J
206,265.15 Joules are needed to warm 675 grams of water from 12 degrees Celsius to 85 degrees Celsius.
4.186 J/degree Celsius, so
73 degrees * 4.186 J/degree = 305.578 J to raise 1 gram 73 degrees
there are 675 grams, so 305.578 * 675 = 206265.15 J
2.06 x 10^5 J are needed
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Taking into account the definition of speed, you get that the average speed of the runner is 7.27 .
It is necessary to know that speed is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it.
In other words, speed can be defined as the amount of space traveled per unit of time with which a body moves and can be calculated using the expression:
In this case:
- distance traveled= 100 meters
- time= 13.75 seconds
Replacing these values in the speed definition:
Solving:
Speed= 7.27
In summary, the average speed of the runner is 7.27 .
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Answer: 7.27 m/s
Explanation: The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval.
Distance traveled= 100 m
Time taken = 13.75 s
Average speed=
Average speed=
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No "ion" is electrically neutral. If it's an ion, then it's charged.
A)2014
B)Cl2
C)Mg
D)Mg2+
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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⁻