Which image(s) in the figure represents a pure compound? A) images A. B. and C:

Question

Which image(s) in the figure represents a pure compound? A) images A. B. and C: B) images C. D. and E; C) images A and B only: D) image A only. E) image B only. Use the solubility table below for questions (a) and lb). (a) Select the ionic compound which is insoluble in water A) Na_2CO_3 B) Fe(NO_3)_3 C) AgNO_3 D) Agl E) (NH_4)_3PO_4 What is the precipitate that forms when solutions of NaBr and Pb(NO_3)_2 are mixed? A) NaNO_3 B) Na(NO_3)_2 C) Na(NO_3)_2 D) Pb_2Br E) PbBr_2 Which of the following statements concerning the reaction below is FAlSE? 2HgO(s) rightarrow 2Hg(l) + O_2(g) Delta H = +182 kJ A) The amount of 91 kJ of energy is required for one mol of HgO that react B) The energy of the reactants is less than the energy of the products C) There system absorbs energy from the surroundings in this reaction. D)There is a decrease in entropy in this reaction. E) This reaction is endothermic.

Explanation / Answer

FRom the figure it is very clear that the image -2 represents the pure compound as it doesnt contain any other copounds that are indicated with thick balck circled.

So option E

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