Physics, Chemistry and Biology: Post your doubts here!

[Phoenix Blood]

The answer is D
Akalis liberate ammonia when they react with Ammonium Salts
Acids turn litmus red

Ty so much!

 

[Awesome12]

???

Find the mass of each compound, and find the mass of H2O in the compound. Take the mass of H2O as a percentage of the total mass

 

[Awesome12]

?

Ammonia is the gas that turns litmus blue.
Sulphur is not essential for plant growth
Potassium and Phosphorus are essential for plant growth, but do not turn litmus blue

You can also solve this using the logic that ammonia's formula is NH3. The nitrogen is only present in the options

 

[Asem Sabry]

draw the structure of starch
can anybody help please??

 

[♣♠ Magnanimous ♣♠]

draw the structure of starch
can anybody help please??

man it is simple... draw the structure of glucose and leave the end bonds long... and keep it in square brackets...
this is due to starch is polymer of glucose.. still u didnt get just tell me.

 

[Asem Sabry]

man it is simple... draw the structure of glucose and leave the end bonds long... and keep it in square brackets...
this is due to starch is polymer of glucose.. still u didnt get just tell me.

thanks for the help

 

[♣♠ Magnanimous ♣♠]

thanks for the help

no probs.

 

[ManalMansoor]

Need help in organic chemistry as a whole
Please help! #dying

 

[shoaib672002]

Plz solve all and with diagrams

Awesome12

 

[♣♠ Magnanimous ♣♠]

View attachment 39223

it is simple..
in combustion --> carbon dioxide is release which today combustion reaction occurs more leads to increase in carbon dioxide conc.
in respiration-->when we breathe out, all the carbon dioxide we exhale has already been accounted for. We are simply returning to the air the same carbon that was there to begin with. Remember, it's a carbon cycle, not a straight line - and a good thing, too!

 

[Awesome12]

Awesome12

For the last question, take your ruler and allign it to the blue line such that its mark coincides with the ray. Then follow it backwards in the deep region, making contact with the already-present wavefronts

 

[rida.12.!!]

it is simple..
in combustion --> carbon dioxide is release which today combustion reaction occurs more leads to increase in carbon dioxide conc.
in respiration-->when we breathe out, all the carbon dioxide we exhale has already been accounted for. We are simply returning to the air the same carbon that was there to begin with. Remember, it's a carbon cycle, not a straight line - and a good thing, too!

ohk thx though!!

 

[♣♠ Magnanimous ♣♠]

no probs.

 

[rida.12.!!]

no probs.

paki ho kia??

 

[♣♠ Magnanimous ♣♠]

paki ho kia??

yes almost.. why am i wrong?

 

[Areeb Mohsin]

This is not actually a doubt but I need a little help
the problem is that my physics sir gave me a book named ' Explaining physics ' by Stephen Pople
that book is really good but he (sir) gave me the book temporarily I have to return it as soon as I can
I tried to go to a copy center copy the book but too expensive ( book is good thats why i need to copy and keep it )
If anyone here can really help me it would mean the world to me ( post a copy of the book here or link or something like that )
the book name is
Explaining Physics gcse Edition
by Stephen Pople
please post as soon as possible as board (IGCSE ) exams are really near
Thank You

 

[rida.12.!!]

yes almost.. why am i wrong?

kkiaaaaa???

 

[rida.12.!!]

yes almost.. why am i wrong?

almost??? :^)

 

[♣♠ Magnanimous ♣♠]

almost??? :^)

well i m not perfect so i always say almost..

 

[rida.12.!!]

LOL same here then!!