The conceptual framework is described in the _______________ section of a research paper.

This study has ____ demonstrations of effect. _______   Replication is used by the investigator to repeat the effect an ___________variable has on the ________________variable. _______ _______

What is the charge on the phosphorus (P) atom in the following Lewis structure? (P-group 5) Presentation8.jpg

Calculate the bond order of the N2 molecule (n is in group 5) Presentation9.jpg

Calculate the ΔH° for the following reaction:Fe2O3 + 3CO = Fe + 3CO2Enthalpy of formation (H°f)Fe2O3 : -824.2 kJ/molCO : -110.5 kJ/molCO2: -393.5 kJ/molUse: Enthalpy change = ∑ – ∑

When the following equation is balanced, find all coefficients (W, X, Y and Z) for the following(hint-balance the chemical equation)W CaCl2(s) + X O2(g) = Y CaO(s) + Z Cl2(g) W X Y Z A 2 2 2 2B 2 1 1 2C 1 1 2 2D 1 1 1 1E 2 1 2 2

Calculate the empirical formula when a sample contains 1.2 g of Nitrogen and 1.4 g of Oxygenmolar mass of ( O = 16.00 g, N = 14.0 g)

Manganese has the oxidation number of +7 in ( O -group 6 element, F- group 7 element, CN- has a charge of -1)

The “halogen” in the following list is

Calculate the molarity of a solution that contains 70.00 g of H2SO4 in 280.00 mL of solution. (molar mass of H2SO4 = 98.07 g molarity = moles/volume in liters, 1 L = 1000 mL)