- . The term Net Purchases is used in the Periodic Inventory system, how is this calculated?

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Sigma n = 1 to infinity cos^2 na = 1/2(n + (cos(n+1)a sin n a / sin na ))? Predict the type of bond that would be formed between each of the following pairs of atoms: 1. O and F 2. H and H 3. Mg and I? Which is better antioxidants between curcumin and tetrahydrocurcumin. if we look at the structure? Please help me? Please help me with this equilibrium question; kindly explain as much detail as you can thanks.? The angular momentum of an electron will be what to its orbit? 1) parallel 2) perpendicular 3) tangent 4) Will it equal zero?