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i got it 24.35 and in the periodic tabel it is 24.3 , i think choosing the closest one would be bestand thus the ans would have been 24.1 as it it is the closest to 24.35, see the examinaer REPORT, somtinh would be mentioned there
hw cn it be 24.8, we have to calculate the ans from data provide and not frmthe websiteusing the dat i get atomic mass of Mg to be= 1900/78no mistake in MS
November 2009 V1..Question 19 Question 21 : Confused between A and C....
but which paper
ammonium nitrate NH4NO3, can decompose explosively when heated.NH4NO3 ----------------> N2O + 2H2Owhat are the changes in the oxidation num of the two N atoms in NH4NO3 when this reaction proceeds?1. -2, -42. +2, +63. +4, -64. +4, -4
THANKEW!! 0.200 mol of a hydrocarbon undergo complete combustion to give 35.2g of carbon dioxide and 14.4g of water as the only products. what is the molecular formula of the hydrocarbon?1. C2H42. C2H63. C4H44. C4H8
for this we get a ratio of 1:2but there are two options of 1:2 haydrocarbons
18 A solid nitrate fertiliser reacts with an alkali to produce a gas which turns damp pH paper blue.What is the empirical formula of this fertiliser?A NO3 B NHO3 C NH2O D N2H4O3D. How and why? :/
1:4 ratio...N of Co2 = 35.2/44 = 0.8N of H20 = 14.4/18 = 0.8So ratio of CxHy:CO2:H2O 1 : 4 : 4So there are 4 C and 8 H and 12O so the Hydrocarbon iS C4H8...