28)When the molecules N2, N2H2, and N2O4 are arranged in order of decreasing N---N bond length (from longest to shortest), which order is correct? a.N2H2, N2O4, N2b.N2H2, N2, N2O4c.N2, N2H2, N2O4d.N2, N2O4, N2H2e.N2O4, N2H2, N2
City University of New York Department of Chemistry GenChem1 Fall 2015 Exam 1A 829)Draw the Lewis structure for CH3CN and then determine which of the following statements about the structure are correct. (HINT: The 2 carbon atoms are connected to one another in this structure) I.There are 2 lone pairs on the N atom II.The first carbon atom contains no lone pairs III.The structure contains 4 single bonds and 1 triple bond IV.The structure contains 3 single bonds and 2 double bonds 30)Hydrazine is a chemical compound with the formula N2H4 and can be produced from the reaction of nitrogen and hydrogen according to the balanced chemical reaction below: N2+ 2H2N2H4Using the table of bond energies to the right, determine the ΔH for this reaction in kJ per mole of hydrazine. 31)Your friend Alejandro was told by his doctor that he needs to consume an additional 2.0 mg of Riboflavin (Vitamin B2) per day. Alejandro went to the pharmacy and bought a new brand of liquid vitamins called Vita-Right. Use the information provided below to help Alejandro determine how many mL of the solution he should take per day to achieve the recommended dosage of 2.0 mg/day. Supplemental Information Serving size: 2 Tbsp (10 mL) Each serving contains: Vitamin A (29% Beta Carotene, 536.9 g/mole) 0.250 mili moles Vitamin B (8.25% Riboflavin, 376.3 g/mole) 0.043 mili moles Vitamin C (100% Ascorbic Acid, 176.1 g/mole) 3.401 mili moles
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