rovide the reagents necessary to carry out the following conversion using a malonic ester synthesis. 1. CH3CH2OH 2. (CH3)3CCH2Br 3. CH3CH2OH 4. 5. H3O , heat 1. NaOCH2CH3 2. (CH3)2CHCH2Br 3. NaOCH2CH3 4. 5. NaOH/H2O 1. NaOCH2CH3 2. (CH3)2CBrCH2Br 3. NaOCH2CH3 4. 5. H3O , heat 1. NaOCH2CH3 2. (CH3)2CHCH2Br 3. NaOCH2CH3 4. 5. H3O , heat

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.