1.Which sample has a lower melting point?
2.Which sample has a higher melting point?
3.Which...
1.Which sample has a lower melting point?
2.Which sample has a higher melting point?
3.Which sample melt completely within a short period of time?
4.Is there sample which seems to be not melting?What is it?
5.From the given samples, identify the pure substance (A) and the mixture (B)
A. Pure Substance_
B. Mixture_
6.Differentiate pure substances from mixtures in terms of melting point.
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Answers: 1
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Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.
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The equilibrium constant kc for the reaction 2 nocl(g) → 2 no(g) + cl2(g) is 0.453 at a certain temperature. a mixture of nocl, no, and cl2 with concentrations 1.30, 1.20, and 0.600 m, respectively, was introduced into a container at this temperature. which of the following is true? 1. no apparent reaction takes place. 2. [cl2] = 0.30 m at equilibrium. 3. nocl(g) is produced until equilibrium is reached. 4. [nocl] = [no] = [cl2] at equilibrium. 5. cl2(g) is produced until equilibrium is
Answers: 3
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