yeah what problem
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Physics, Chemistry and Biology: Post your doubts here!
- Thread starter semsemhosam
- Start date
for which subs?
try to go to the microsoft website
1 Air is a mixture of gases. The main constituents are the elements oxygen and nitrogen.
(a) (i) Name another element in air.
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(ii) Give the formula of a compound in unpolluted air.
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(b) Common pollutants present in air are the oxides of nitrogen and sulfur dioxide.
(i) How are the oxides of nitrogen formed?
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.............................................................................................................................. [2]
(ii) How is sulfur dioxide formed?
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(iii) These oxides are largely responsible for acid rain.
State two harmful effects of acid rain.
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.............................................................................................................................. [2]
(a) (i) Name another element in air.
.............................................................................................................................. [1]
(ii) Give the formula of a compound in unpolluted air.
.............................................................................................................................. [1]
(b) Common pollutants present in air are the oxides of nitrogen and sulfur dioxide.
(i) How are the oxides of nitrogen formed?
...................................................................................................................................
...................................................................................................................................
.............................................................................................................................. [2]
(ii) How is sulfur dioxide formed?
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.............................................................................................................................. [2]
(iii) These oxides are largely responsible for acid rain.
State two harmful effects of acid rain.
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.............................................................................................................................. [2]
no i cant find ther for free
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so hello.......
a(i) the element is carbon-dioxide.
(ii) CO2.
b(i) Nitrogen oxides (NOx), such as nitrous oxide and nitrogen dioxide are formed by reaction of nitrogen with oxygen in the air used during combustion.
(ii) A range of sulphur oxides (SOx) are formed by reaction of sulphur impurities (or maybe additives) in the fuel with oxygen in the air SOx will form sulphuric or sulphurous acid that will also contribute to acid rain.
(iii)
Some plants are tolerant of acidic conditions, while others are not. Acidic soils may affect microorganisms in the soil, which play important roles in plant growth.
it effects the statues especially those which are made up of limeston......
I hope my answer helped you....
so hello.......
a(i) the element is carbon-dioxide.
(ii) CO2.
b(i) Nitrogen oxides (NOx), such as nitrous oxide and nitrogen dioxide are formed by reaction of nitrogen with oxygen in the air used during combustion.
(ii) A range of sulphur oxides (SOx) are formed by reaction of sulphur impurities (or maybe additives) in the fuel with oxygen in the air SOx will form sulphuric or sulphurous acid that will also contribute to acid rain.
(iii)
Some plants are tolerant of acidic conditions, while others are not. Acidic soils may affect microorganisms in the soil, which play important roles in plant growth.
it effects the statues especially those which are made up of limeston......
I hope my answer helped y
obviously thanks alot but if u dont mind i hav more doubts can u or the community will hellp me for my mocks
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Hey, does anyone have the enterprise October November paper 1. Could you please give it to me. It's the year 2013 only. Thanks in advance.
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I need help with a paper 1 Biology question:
-Which pollutant gas is produced by the decomposition of vegetation?
A carbon monoxide
B methane
C nitrogen oxide
D sulfur dioxide
I know the answer is B, but how is the decomposition of vegetation related to methane production? I never read about it in my textbook..
Thanks in advance!
-Which pollutant gas is produced by the decomposition of vegetation?
A carbon monoxide
B methane
C nitrogen oxide
D sulfur dioxide
I know the answer is B, but how is the decomposition of vegetation related to methane production? I never read about it in my textbook..
Thanks in advance!
have u ever heard of biogas? or gas produced for local use by using cow dungs. their combustion release methane
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Physics
how do you draw a normal on a curved surface?
What does gamma ray do?
how can i draw wavefront from deep to shallow water
how do you draw a normal on a curved surface?
What does gamma ray do?
how can i draw wavefront from deep to shallow water
ans 1. take ur scale and allign any mark of it (eg. 1 cm), such that the line touches the curved surface
like this
Ans. 2 what do u mean 'what do they do' u shud be more specific
Ans. 3 a deep region is LESS DENSE than a shallow region (ie. shallower region is MORE DENSE)
u may have studied that when light passes from a less dense to a denser medium, it speed, and wavelength decreases, but the frequency remains constant
as a result, u might be given the wavefronts for the deep region, and all u have to do is make wavefronts with a smaller wavelength for the shallow region
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thanks..!
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"Suggest why alkanes burn with a non-smoky flame but alkenes burn with a smoky flame"? A little help please.
when completely combusted, alkenes burn to produce less soot as compared to alkanes
also alkenes have strained double carbon carbon bond and so more energy is released when it burns
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Thanks!!!