Questions about Ozone
Answers
The exothermic step in ozone reactions is O₃ → O₂ + O. The most endothermic step is 3O₂ → 2O₃ because it needs energy to break the double bond in O₂. Ozone can be decomposed by light with a longer wavelength because the O-O bond in ozone is weaker than the O=O double bond in oxygen.
The reactions mentioned are involved in the ozone production and destruction in the atmosphere. The first reaction : 3O₂ → 2O₃ is an endothermic process as it needs energy (in the form of UV light) to break the double bond in O₂ and form O₃. However, the reaction : O₃ → O₂ + O is exothermic. It involves the breaking of the weaker bond in O3 and formation of a stronger O₂ molecule and oxygen atom. Thus, the answer to part (a) would be the step O₃ → O₂ + O.
For part (b), the most endothermic step would again be 3O₂ → 2O₃. Lastly, the explanation of why ozone can be decomposed by light with a longer wavelength than that required to decompose oxygen is because the O-O bond in ozone is weaker than the O=O double bond in oxygen. Hence, it requires less energy (or light of longer wavelength) to break the O-O bond in ozone, leading to its decomposition.
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It is believed the major reason for the decline in amphibian species is _______.a.death through diseaseb.changing reproductive habitsc.mutationd.climate change
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Molecules in a sample of NH3(l) are held closely together by intermolecular forces(1) existing between ions(2) existing between electrons(3) caused by different numbers of neutrons(4) caused by unequal charge distribution
Answers
- The materials is being build up throughout time in the lake or sea, causing its salinity to increase
- when this saline solution is evaporated, the ions in the water precipitate, forming an evaporite
Sediments are buried, pressure increases, volume of sediment decreases, sandstone compresses, saline solution becomes evaporated,and thenforms an evaporite.
What is an evaporite?
An evaporite can be defined as a mineral deposit containing saline substances that are produced due to the evaporation of a water body.
In this context, the sequence of events in the formation of an evaporite are listed as follows:
- Sediments are buried.
- Increase pressure pushes the grains closer together.
- Decrease in the volume of sediment, which cause fluids between the grains to be squeezed out.
- Sandstone are left tightly compressed together.
- The saline solution becomes evaporated, and then the ions contained in the water precipitates, forming an evaporite.
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B. farmer
C. painter
D. carpenter
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There are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.
How to find the number of atoms
To determine the number of atoms in a given amount of a substance, you can use Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.
Given that you have 0.750 moles of zinc, you can calculate the number of atoms using the following steps:
Multiply the given number of moles by Avogadro's number:
0.750 moles * (6.022 x 10^23 atoms/mol) = 4.5165 x 10^23 atoms
Round the result to an appropriate number of significant figures:
Since the value given has three significant figures, the final answer should be rounded accordingly. Therefore, the number of atoms in 0.750 moles of zinc is approximately 4.52 x 10^23 atoms.
So, there are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.
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It is
B. A new gas is observed in the form of bubbles
C. Red and yellow paint mixing to make orange
D. The temperature of the substance remains constant updates
Answers
To solve such this we must know the concept of chemical reaction. Therefore, the correct option is option B that is a new gas is observed in the form of bubbles.
What is chemical reaction?
Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
The characteristics of chemical reaction are:
Evolution of a Gas
Change in temperature
Change in color
Formation of Precipitate
The evidence that a chemical reaction has occurred is a new gas is observed in the form of bubbles.
Therefore, the correct option is option B that is a new gas is observed in the form of bubbles.
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b. isomer
c. alkene
d. alkyne
Answers
Answer:
Explanation:
Alkanes are saturated hydrocarbons with only single bonds of carbon and hydrogen.
b. Oxygen
c. Sulfur
d. Phosphorus
e. Fluorine