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Which one of the following will have largest number of atoms?Ĭalcium carbonate reacts with aqueous HCl to give CaCl 2 and CO 2 according to the reaction,ĬaCO 3(s) + 2 HCl (aq) → CaCl 2(aq) + CO 2(g) + H 2O (l) (iii) 100 atoms of A + 100 molecules of B

In a reaction A + B2 → AB2 Identify the limiting reagent, if any, in the following reaction mixtures. (d) Cr 2O 7 2– + SO 2(g) → Cr 3+ (aq) + SO 4 2– (aq) (in acidic solution)ĭetermine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass. (c) H 2O 2 (aq) + Fe 2+ (aq) → Fe 3+ (aq) + H 2O (l) (in acidic solution) (b) MnO 4 – (aq) + SO 2 (g) → Mn 2+ (aq) + HSO 4 – (aq) (in acidic solution) (a) MnO 4 – (aq) + I – (aq) → MnO 2 (s) + I 2(s) (in basic medium) (iii) 2 moles of carbon are burnt in 16 g of dioxygen.Ĭalculate the wavelength of an electron moving with a velocity of 2.05 × 10 7 ms –1.īalance the following redox reactions by ion – electron method : (ii) 1 mole of carbon is burnt in 16 g of dioxygen. is 3.0 × 10 –25 J, calculate its wavelength.Ĭalculate the amount of carbon dioxide that could be produced when The mass of an electron is 9.1 × 10 –31 kg.