Part A Dinitrogen oxide (or nitrous oxide), \( \mathrm{N}_{2} \mathrm{O} \), also known as laughing gas, is widely used as an enesthetic in dentistry How many grams are in 1.35 moles of dinitrogen oxide? Express your answer using three significant figures. \[ 594 \mathrm{~g} \] \( \square \) Previous Answers Correct Part B How many moles are in 34.2 g of dinitrogen oxide? Express your answer using three significant figures. \( \square \) mole

To find the number of moles in 34.2 g of dinitrogen oxide (\( \mathrm{N}_{2} \mathrm{O} \)), you can use the molar mass of \( \mathrm{N}_{2} \mathrm{O} \). The molar mass is approximately 44.01 g/mol. Using the formula: \[ \text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} \] You would calculate: \[ \text{moles} = \frac{34.2 \mathrm{~g}}{44.01 \mathrm{~g/mol}} \approx 0.777 \text{ moles} \] So, the answer, expressed using three significant figures, is: \( 0.777 \) mole --- Dinitrogen oxide has been used for centuries, first discovered in the late 18th century by the scientist Joseph Priestley. It was originally used for its euphoric effects before it became a crucial anesthetic agent. Its ability to induce a state of sedation while maintaining consciousness made it a favorite in dental practices. In real-world applications, nitrous oxide's use isn't limited to dentistry; it's also popular in surgery and various medical procedures for pain relief and anxiety management. Even in the culinary world, it's used as a propellant in whipped cream dispensers, showcasing its versatility beyond the medical field!