Biology; Chemistry; Physics: Post your doubts here!

[Amnaa]

answer would b. option b

how? can you please explain me?

 

[pinkywinkypuffy]

can anyone explain me the differences between empirical formula and relative molecular mass?

The empirical formula of a compound is a formula that shows the ratio of elementspresent in the compound. The ratios are denoted by subscripts next to the element symbols

 

[pinkywinkypuffy]

can anyone explain me the differences between empirical formula and relative molecular mass?

is it relative molecular mass or molecular formula u wanna knw abt?

 

[Amnaa]

is it relative molecular mass or molecular formula u wanna knw abt?

both

 

[pinkywinkypuffy]

how? can you please explain me?

sweetheart ...in a metal lattice ,as thy have a sea of free moving electron ...n thy cant b send out of the lattice so thy keep transferring it within itself .....means electron are replaced by new one....n protons dnt move cause thy stay within the nucleus.....so optin b is the right one

 

[Amnaa]

sweetheart ...in a metal lattice ,as thy have a sea of free moving electron ...n thy cant b send out of the lattice so thy keep transferring it within itself .....means electron are replaced by new one....n protons dnt move cause thy stay within the nucleus.....so optin b is the right one

Oh.! thank you

 

[pinkywinkypuffy]

both

the sum of all the relative atomic masses of the atoms in a molecule; the ratio of the average mass per molecule of a specified isotopic composition of a substance to one-twelfth the mass of an atom of carbon-12. Symbol Mr Abbreviation r.m.m Former name relative molecular mass

 

[pinkywinkypuffy]

both

A chemical formula that shows the total number and kinds of atoms in a molecule, but not their structural arrangement. For example, the molecular formula of aspirin is C9H8O4. is known as molecular formula

 

[pinkywinkypuffy]

A chemical formula that shows the total number and kinds of atoms in a molecule, but not their structural arrangement. For example,
A chemical formula that shows the total number and kinds of atoms in a molecule, but not their structural arrangement is kown as molecular formula

 

[pinkywinkypuffy]

I Need these notes too. Please provide.

guyz i do hv the notes.....
will upload thm in an hour or so

 

[pinkywinkypuffy]

anyone has notes for CRO, Practical Electricity (including diodes, capacitors) Electromagnetic induction...please share...i am weakest in these topic.

guyz i do hv the notes.....
will upload thm in an hour or so​

 

[Amnaa]

i think it might can b ,option D.....i think im nt sure

the answer is B

 

[pinkywinkypuffy]

the answer is B

thxz for correcting me....cn u explain ma plx

 

[pinkywinkypuffy]

anyone has notes for CRO, Practical Electricity (including diodes, capacitors) Electromagnetic induction...please share...i am weakest in these topic.

i hope it will b helpful to u guyz..if anything is missing or u want notes for other topic ..im alwayz there to help ....hope u like it.....

 

[Amnaa]

thxz for correcting me....cn u explain ma plx

yaar.. mujhe nahi pata how can i explain you

 

[Amnaa]

yaar.. mujhe nahi pata how can i explain you

I'm fail in chemistry

 

[pinkywinkypuffy]

I'm fail in chemistry

awwwwwww *hugies*...amna trust me muhje b chmstry ki abc b nae ati thi aik month phly tak .....but Allah ka sukar hai ..im kind ov better in it...just keep reading sweeti ..n keep ur faith in Allah ..ur nail it ..dnt worry ..just work hard

 

[pinkywinkypuffy]

air oxygen ,hydrogen and water ka chapter zaror parna ..

I'm fail in chemistry

 

[Amnaa]

http://papers.xtremepapers.com/CIE/...l O Level/Chemistry (5070)/5070_s11_qp_11.pdf
question no.12 .. please.

 

[Amnaa]

do you have notes related to these topics..??