Answer:
Ne
Explanation:
Step 1:
Data obtained from the question. This includes:
Mass of O2 = 5g
Mass of C2H6 = 5g
Mass of CO2 = 5g
Mass of Ne = 5g
Step 2:
Determination of the number of mole of each gas:
For O2:
Mass of O2 = 5g
Molar Mass of O2 = 16x2 = 32g/mol
Number of mole of O2 =?
Number of mole = Mass/Molar Mass
Number of mole of O2 = 5/32
Number of mole of O2 = 0.156 mole
For C2H6:
Mass of C2H6 = 5g
Molar Mass of C2H6 = (12x2) + (6x1) = 24 + 6 = 30g/mol
Number of mole of C2H6 =?
Number of mole = Mass/Molar Mass
Number of mole of C2H6 = 5/30
Number of mole of C2H6 = 0.167 mole
For CO2:
Mass of CO2 = 5g
Molar Mass of CO2 = 12 + 16x2 = 12 + 32 = 44g/mol
Number of mole of CO2 =?
Number of mole = Mass/Molar Mass
Number of mole of CO2 = 5/44
Number of mole of CO2 = 0.114 mole
For Ne:
Mass of Ne = 5g
Molar Mass of Ne = 20g/mol
Number of mole of Ne =?
Number of mole = Mass/Molar Mass
Number of mole of Ne = 5/20
Number of mole of Ne = 0.25 mole
Step 3:
Determination of the volume occupied by the each gas.
1 mole of a gas occupy 22.4L at stp.
For O2:
0.156 mole will occupy = 0.156 x 22.4 = 3.49 L
For C2H6:
0.167 mole Will occupy = 0.167 x 22.4 = 3.74 L
For CO2:
0.114 mole Will occupy = 0.114 x 22.4 = 2.55 L
For Ne:
0.25 mole will occupy = 0.25 x 22.4 = 5.6 L
From the calculations made above, Ne has the largest volume
Gravity plays an important role in how we build our houses and structures. If gravity was much weaker on Earth, we would be able to use structures that are not as resistant. Buildings would not have to carry as much weight, which would mean that weaker materials would be able to be used.
On the other hand, much stronger gravity would mean that buildings would have to endure a lot more pressure. Moreover, everything inside the building (furniture, people, etc.) would be heavier, which would require stronger structures.
Answer:
3.4
Explanation:
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.
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.
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