Chapter 2.8, Problem 5LTS

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Which of the following starting materials and reagents would be best to produce a racemic mixture of 3-methyl-3-hexanol?    heptanone and 1. CH3MgBr 2. H3O+        hexanal and 1. CH3MgBr, 2. H3O+        3-hexanone and 1. CH3MgBr, 2. H3O+        butanal and 1. CH3CH2MgBr, 2. H3O+

Can someone draw a reaction mechanism of this reaction please I was told that the boc l alanine is deprotonated first and acts as the nucleophile attacking the EDCL and can you please show all the intermediates and side products and the water at the end

X- 22.5 d 33.0 d P17E.3 Two radioactive nuclides decay by successive first-order processes: → Y → Z (the quantities over the arrows are the half-lives in days). Suppose that Y is an isotope that is required for medical applications. At what time after X is first formed will Y be most abundant?

Use solubility rules to complete balance molecular equations, and provide total and net ionic equations. Silver Nitrate and Iron(III) Nitrate Copper(II) Sulfate and Ammonium Chloride Copper(II) Sulfate and Magnesium Chloride NH₄Cl(aq) + MgCl₂(aq) → NH₄Cl(aq) + Fe(NO₃)₃(aq) → NH₄Cl(aq) + BaCl₂(aq) →