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

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)

Which of the following is a disadvantage of the edrophonium test? A. Initiate mechanical ventilation per protocol is likely following the test B. It can be complicated by cholinergic side effects C. It should not be given to patients with a history of asthma D. Associated with false-negative and false-positive results 50% of the time

(Table: Jack and Jill I)   Jill Bring pail Don’t bring pail Jack Climb hill 30, 20 10, 10 Don’t climb hill 0, 0 20, 30 If Jack does not climb the hill and Jill does not bring the pail, Jill’s payoff is _____.