What is the mass of sodium chloride used to make a 100 mL solution at a concentration of 1.5 M? Your solution must include a step-by-step solution with units included throughout. 2. For the nitrite ion (NO), identify: How many total lone pairs are in the ion? What is the molecular shape of the ion? How many resonance structures can be drawn from the ion? 3. As a birthday balloon is filled with helium, the amount of helium increases from 0.5 moles of helium to 5.5 moles of helium. If the initial volume of the balloon is 2.5 mL, what is the final volume? Your solution must include a step-by-step solution with units included throughout. 4. Given the reaction between ammonia and oxygen as 4NH, +50, 4NO + 6HO: Calculate the amount of nitrogen monoxide (in grams) produced if 0.5 g of ammonia is reacted with 0.5 g of oxygen. Indicate what the limiting reactant is. Your solution must include a step-by-step solution with units included throughout. 5. Water has a specific heat of 4.18 J/g- "C. What is the quantity of energy (in kJ) required to increase the temperature of a 50.0 g sample of water from 25 C to 99 C? Your solution must include a step-by-step solution with units included throughout.