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Recent content by Ltzewei

  1. L

    Chemistry MCQ thread...

    For 6, A would give 1p,2e,1n. B would be 11p,10e,8n. C gives 9p,10e,9n. D gives 9p,10e,8n So the obvious answer would be D For 7, 1 is 109.5 as it is a tetrahedral structure,2 is 120 because its a planar. 3 has a bent shape due to the 2 lone pair of electrons, making it 104. So the answer is C...
  2. L

    Biology; Chemistry; Physics: Post your doubts here!

    Thank you very much! I just realized that haha :D
  3. L

    Biology; Chemistry; Physics: Post your doubts here!

    Hello , can someone explain to me why is the answer A for this question: 28. All ammonium salts on heating with sodium hydroxide produce ammonia gas. From which ammonium salt can the greatest mass of ammonia be obtained? A 0.5 mol (NH4)3PO4 B 0.5 mol (NH4)2SO4 C 1.0 mol NH4Cl D 1.0 mol NH4NO3...
  4. L

    Biology; Chemistry; Physics: Post your doubts here!

    Hello everyone! Can you guys explain this to me? (c) Between points A and B on Fig. 4.1, the temperature is constant as the substance changes from liquid to solid. (i) Explain why the temperature stays constant, even though thermal energy is lost by the substance. Thanks :D
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