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AnnyKZ [126]
3 years ago
13

HELP!!!!!ASAP!!!!!!!!!!!PLEASE!!!!!!!!!!NOW!!!!!

Mathematics
2 answers:
Luba_88 [7]3 years ago
7 0

Answer:

c

Step-by-step explanation:

zvonat [6]3 years ago
6 0

Answer:

x=30cm

Step-by-step explanation:

The sides are proportionate so you can solve this by using ratios 75/30=x/12

Cross Multiply

30x=900

x=30

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The substance x and y had retention times of 16.4 and 17.63 minutes on a 30 cm column. unretained species had 1.30 minutes reten
s2008m [1.1K]
Column Resolution
Rs = 2[(tr)y - (tr)x]/[Wx + Wy]
= 2[17.63 - 16.4]/ [1.11 + 1.21] = 1.06

Average no. of plates in the column for substance x 
N = 16(tr/ W)^2
N = 16(16.4/1.11)^2
N = 3490 plates 

Average no. of plates in the column for substance y 
N = 16(tr/ W)^2
N = 16(17.63/1.21)^2
N = 3397 plates 

Plates Height
H = L/N

For substance x 
H = 30/3490
H= 0.00916905 cm/plate 

For substance y 
H = 30/3397
H = 0.00883132 cm/plate 





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