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ALL CIE BIOLOGY DOUBTS HERE !!!
minicooper:
Does anyone have specific advice on plan diagrams or taking readings? Such as, significant figures? How much detail does drawings of [magnified] cells require?
Romeesa-Chan:
--- Quote from: minicooper on November 05, 2011, 07:08:30 pm ---Does anyone have specific advice on plan diagrams or taking readings? Such as, significant figures? How much detail does drawings of [magnified] cells require?
--- End quote ---
I will try uploading some notes on it by day after tomorrow. Just send me a PM if I forget.
Rvel Zahid:
Hi!
http://www.xtremepapers.com/CIE/International A And AS Level/9700 - Biology/9700_s03_qp_1.pdf
q, 7 , 18 and 25.
http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s03_qp_2.pdf
http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s03_ms_1+2+3+4+5+6.pdf
Ans 6 c part, marking scheme gives two answers for this question. which points to be considered.
Thank you.
conquerpro:
can someone plzz solve this MCQ for me and explain?
a sample of swimming pool water contains 0.482 ppm of chlorine.this is equal to a percentage of
A.0.000482
B.0.0000482
C.0.00000482
D.0.000000482
this is from edexcel chem 1
[/quote]
Deadly_king:
--- Quote from: conquerpro on April 10, 2014, 10:09:52 pm ---can someone plzz solve this MCQ for me and explain?
a sample of swimming pool water contains 0.482 ppm of chlorine.this is equal to a percentage of
A.0.000482
B.0.0000482
C.0.00000482
D.0.000000482
this is from edexcel chem 1
--- End quote ---
Answer is B.
ppm - particles per million meaning 106
% - 100 meaning 102
From here it's basic equation
Ans = (0.482/106)*102 = 0.0000482
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