What is the empirical formula of sulphur dioxide which contains 50% by mass of sulphur
Answers
Answer:
Empirical formula is SO2.
Explanation:
So the fraction of Sulphur is 0.50 and the fraction of oxygen is 0.50.
Dividing by the atomic masses of sulphur and oxygen:
S = .50 / 32 = 0.015625
O = .50 / 16 = 0.3125
Ratio of S: O = 0.015625/ 0.015625 to 0.3125/ 0.015625
= 1:2.
Answer:
Question what are you doing the same thing you guys have a good time
Explanation:
is this the same question why did they do that and how much they do it
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The tail of a comet always points where?
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Final answer:
To understand if the black crust on the silver coins signifies a chemical or physical change, you should determine if the substance's identity is altered. This is because a chemical change transforms the substance into a new material, while a physical change only alters its form. Knowing whether the crust changes the original silver coin's nature can differentiate between the two.
Explanation:
To discern whether the black crust on the silver coins signifies a chemical change or a physical change, you could ask: 'Can the black crust be removed to reveal the original silver coin beneath, without altering the silver coin's composition?'
This question is crucial because the main difference between chemical and physical changes on whether the substance's identity is altered. In a chemical change, substances are transformed into entirely new materials with different properties. An example of this is iron rusting. On the contrary, a physical change, such as ice melting into water, does not change the substance's fundamental nature, only its form.
If the black crust on the silver coins is a result of oxidation (combines with oxygen), similar to that in a rusting process, this would indicate a chemical change. However, if the black crust is merely tarnishing that can be polished off to reveal the same silver beneath, this would be an example of a physical change. Thus, understanding whether the crust alters the fundamental nature of the silver is important to differentiate between a chemical change and a physical change.
Learn more about Chemical and Physical Changes here:
#SPJ11
Properties of a substance remain unchanged.
Composition of a substance is same as before.
Different atoms than before are introduced after the change.
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The answer is the last option.
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Answer
When vibration of molecules increases, the temperature, internal energy and kinetic energy of the substance increases.
Explanations
The kinetic theory of matter explains that when vibration of molecules increase as a result of heat, molecules move faster and the space between atoms increases. The increased molecular motion results into expansion of the object which takes more space. Increased vibration can make a molecule absorb discrete amounts of energy through the various vibration modes. When the motion increases, the velocity of the entire molecule rises as a random Brownian movement to increase the kinetic energy and internal energy of the molecule.
Answer:
All of the above. Hope this hepls:)
B.)It clearly depicts the particular set of characteristics being modeled.
C.)It is an exact visual representation of the characteristics being modeled.
D.)It is the same size and color as the scientific phenomena being demonstrated.
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Answers
Answer:
42 m/s
Explanation:
To we convert units for speed we can use dimensional analysis. First thing we do is seperate the measurement into a fraction. After this we can multiply by 1km over 0.62137 miles. We do this so that the miles cancel out.
×
=
After this we can use a conversion factor and divide by 3.6.
÷ 3.6 = 42 m/s