PASS YOUR NECOGCE AND NABTEBGCE WITH EASE. NABTEB NO. 1 - TopicsExpress



          

PASS YOUR NECOGCE AND NABTEBGCE WITH EASE. NABTEB NO. 1 CHEMISTRY PRACTICAL ANSWER NOW AVAILABLE 3days to exams 1.)i CAVA/CBVB =NA/NB =0.327*21.50/CB *25.0=2/1 CB= 0.327*21.50*1/2*25 CB =7.0305/50 =0.14061moldm-3 concentration of the anhydrous sodium trioxocarbonate(iv) = 0.14061moldm-3 ii. Concentration of anhydrous Na2CO3 in gdm-3 concentration of anhydrous Na2CO3 in moldm-3 * molar mass molar mass of Na2CO3 = 46+12+48 = 106gmol-1 concentration of Na2CO3 in gdm-3 = bi. Percentage accuracy = accurate - error/accurate *100% =21.60-21.40/21.60*100% =0.2/21.60*100% = 20/21.6 =0.93% =1.0% ii. From colourless to yellow color ci.) to avoid error due to contamination ii. Because it is brittle material which snaps under high temper..... Please read all at NIGERIAN EXAMINATIONS HELP CENTER STRICTLY FOR NIGERIAN YOUTHS PREPARING FOR NABTEBGCE AND NECOGCE. CLICK HERE TO JOIN US AND ENJOY ALL NECOGCE AND NABTEBGCE EXPO 3DAYS B4 THE EXAMS FREE TO AIR
Posted on: Sun, 03 Nov 2013 18:34:36 +0000

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