Chemistry: Post your doubts here!

[♣♠ Magnanimous ♣♠]

not really :S
ask abdul moeed rana he's givin A2

ok
help me abdul moeed rana

 

[Bilal Khan]

do you know anyone else?

About what ?

 

[Bilal Khan]

ok
help me abdul moeed rana

He is giving AS , not A2 .

 

[♣♠ Magnanimous ♣♠]

Can anyone solve this -->
A 6.90 M solution of KOH in water contains 30% by mass of KOH. Calculate the density of the
KOH solution?
[Molar mass of KOH = 56 g mol –1]

plzz

About what ?

Here 6.90 M is molarity not mole.

 

[Bilal Khan]

Can anyone solve this -->
A 6.90 M solution of KOH in water contains 30% by mass of KOH. Calculate the density of the
KOH solution?
[Molar mass of KOH = 56 g mol –1]

plzz


Here 6.90 M is molarity not mole.

Is it A2 question ?

 

[♣♠ Magnanimous ♣♠]

Is it A2 question ?

Nope!
It's something else.
Do you know how to solve?

 

[Bilal Khan]

Nope!
It's something else.
Do you know how to solve?

Maybe .
Give me the question link .

 

[♣♠ Magnanimous ♣♠]

link is not needed coz that is the whole ques.

Maybe .
Give me the question link .

 

[Bilal Khan]

link is not needed coz that is the whole ques.

Oh , okay , lemme try .

 

[♣♠ Magnanimous ♣♠]

Oh , okay , lemme try .

Thanks in advance

 

[Bilal Khan]

Thanks in advance

Just give me its mass .

 

[♣♠ Magnanimous ♣♠]

Just give me its mass .

mass of wat?

 

[emilyy]

mass of wat?

wats the answer of this questn?

 

[Bilal Khan]

mass of wat?

mass of KOH .

 

[♣♠ Magnanimous ♣♠]

wats the answer?

what's your answer?
See I am getting 2.3 and 7.7
Answer is either 2.3 or 7.7
So wat's your answer?

 

[♣♠ Magnanimous ♣♠]

mass of KOH .

Is this right?

 

[Bilal Khan]

0.043

 

[Bilal Khan]

Is this right?

yes

 

[emilyy]

what's your answer?
See I am getting 2.3 and 7.7
Answer is either 2.3 or 7.7
So wat's your answer?

2.3

 

[♣♠ Magnanimous ♣♠]

yes

You sure?
But I have one doubt.
In ques it is said Calculate the density of the
KOH solution?
So do we have keep mass for whole solution i.e. 100 g ( I took it) or only mass of KOH i.e. 30 grams? [ In finding density, the last step]