Given the redox reaction:Cr3+ + Al-->Cr + Al3+
As the reaction takes place, there is a transfer of
(1) electrons from Al to Cr3+
(2) electrons from Cr3+ to Al
(3) protons from Al to Cr3+
(4) protons from Cr3+ to Al
Answers
Answer: (1) electrons from Al to
Explanation: Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.
Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.
Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.
For the given reaction:
The oxidation state of chromium reduces from +3 to 0, it is getting reduced and gains electrons. The oxidation state of aluminium increases from 0 to +3. Thus, it is getting oxidized and it loses electrons. Thus electrons are transferred from to
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Answer:
Fourth Stroke.
Explanation:
There are four strokes in a car engine
a) Intake stroke: In this stroke the air and fuel is being pumped into the compressor from intake valve.
b) compression stroke: The piston moves upward and the fuel air mixture undergoes compression.
c)combustion stroke: The spark plug generates a spark and the fuel undergoes combustion. The energy produced push the piston backwards or downwards.
d) Exhaust stroke: the exhaust gases like carbon dioxide , water, carbon monoxide etc are forced up by the piston.
Answers
I hope this helps. Let me know if anything is unclear.
Answers
v=vo + at
v=0 + (9.8)(8)
v=78.4
y=1/2(vo + v)t
y=1/2(78.4)(8)
y=1/2(627.2)
y=313.6m
The answer will be A 313.6
Answers
Answer:
CO2,H2S,HALON,FREON that's is the four toxicants that are heavier than air
Answers
Answer and explanation;
Coal has aromatic hydrocarbons with high molar mass and has a high ratio of carbon to hydrogen. Burning coal produces more soot than burning other fossil fuels does because of it.
Fossil fuel mixtures of hydrocarbons that formed from the remains of plants or animals. Burning fossil fuels increases the amount of carbon dioxide in the atmosphere. This increase may affect temperatures, amounts of rain and sea levels worldwide. Some sulfur and nitrogen are in fossil fuels, and air contains nitrogen.
Final answer:
Coal produces more soot than other fossil fuels as it is a carbon-rich fossil fuel, where some carbon atoms form soot particles during burning. The combustion of coal is less efficient, producing more particulates and carbon dioxide per unit energy output, thus contributing to air pollution and global warming.
Explanation:
Coal typically produces more soot than other fossil fuels when burned due to its composition. Unlike natural gas or oil, coal is a carbon-rich fossil fuel. When this carbon burns, it reacts with oxygen to form carbon dioxide, but not all carbon atoms complete this reaction. Some form tiny carbon particles or soot instead. These soot particles consist of amorphous carbon, which has a disorganized and complex structure, leading to the dark, dust-like quality of soot.
Historically, the burning of coal was ubiquitous in the Industrial Age, leading to severe air pollution with coal soot covering surfaces in industrial cities. This is because the combustion of coal is less efficient than other fossil fuels, producing more particulates and carbon dioxide per unit energy output. Consequently, the combustion of fossil fuels, and coal in particular, contributes to the greenhouse effect and global warming. In fact, coal-fired power plants produce the greatest amount of CO₂ per unit energy output compared to natural gas or oil, making it the least efficient fossil fuel in terms of greenhouse gas emissions.
Learn more about Combustion of Coal here:
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FeCl3
Fe2(SO4)3
PbO
PbO2
Pb3O4
Answers
FeCl3= 162.2
Fe2(SO4)3= 354.88
PbO=223.2
PbO2 = 239.2
Pb3O4=685.6