Created by StemPy LabCalcium carbide reacts with water and gives a gas X. X is passed through a red hot iron tube at and gives a liquid Y. Y is then treated with excess chlorine in ultraviolet light at and gives a solid Z. Take the atomic masses in as H 1, C 12 and Cl 35.5. What is the molar mass of Z?
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← Benzene is nitrated with a mixture of concentrated HNO₃ and concentrated H₂SO₄. The figure shows the steps: the nitronium ion attacks the ring in a slow step, and the intermediate is drawn as three resonance structures. In the fast last step, the hydrogen sulphate ion takes part. Which statement about this intermediate is correct?Two statements about the structure of benzene are given below. Statement I: Benzene forms a triozonide, which points to three double bonds, yet only one ortho-disubstituted product is known, though a fixed Kekulé structure predicts two. Statement II: X-ray diffraction shows all six carbon to carbon bonds are 139 pm long, between the C-C single bond (154 pm) and the C=C double bond (133 pm). →
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