Chem 101l lab 4 - Study guides, Class notes & Summaries

Avogadro’s number: Select one: a. Equals 6.02 × 10 molecules/mole. b. Is used to determine the number of atoms or molecules in a substance. c. Equals the number of atoms in 12 gram of C. d. All of the above. Calculate the molecular mass of calcium chloride (CaCl ). Select one: a. 35.45 g/mol b. 110.98 g/mol c. 40.08 g/mol d. 75.53 g/mol True or false: Avogadro’s number is named after the nineteenth century Italian scientist Amedeo Avogadro Select one: a. True b. False

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CHEM 101L FINAL QUESTIONS AND ANSWERS exit the lab and proceed to the stairs nearest the Venable parking lot and Columbia Street. After exiting on the ground floor you should meet your TA on the far side of the driveway to the parking lot so that you can be included in a head count of those safely evacuated, keeping the drive clear for emergency vehicles/exit the lab and proceed to the stairs nearest the elevator. After exiting on the ground floor you should meet your TA in front of the sig...

CHEM 101L UNC FINAL QUESTIONS AND ANSWERS If a flammable substance in a beaker should catch fire while you are working but the flames are relatively contained, what should you do to extinguish the flame? What should you not do? DO: Use the chemical fire extinguisher from the lab. Pull the pin, aim the nozzle to the beaker, and pull the lever. DO (Best, simplest): Turn off the heat source immediately and use a watch glass to cover the beaker. DON'T: Use water from the nearest sink to d...

CHEM 101L QUESTIONS AND ANSWERS Apparel Attire: long well fitting cotton or wool clothing; closed leather shoes, no jewelry, no make up application, no contacts PPE Always wear googles, wear gloves except when leaving the lab and working with electronics/labtop Chemical Safety- -1-label -2-spill -3-acid or water Bunsen Burner Safety- -1-step one? -2-flame goes out? smell gass? -3-chipped glass? -4-how to heat flammable chemicals? Thermometer safety -1-shake it? -2-temp range ...

CHEM 101L QUESTIONS AND ANSWERS when should you not wear gloves in the laboratory setting? when using your laptop, opening the door what should you do if you get solution on your gloves and up your arm notify the TA, rinse arm under distilled water for at least 15 min when is it acceptable to eat at the lab bench? NEVER! if you are hypoglycemic take your snack outside of the lab define accuracy How close data measurements are from the accepted or "true" value. define precisi...

CHEM 101L QUESTIONS AND ANSWERS a. What are the proper procedures to respond to and accident? report any accidents to the ta fire extinguishers are just below waist level on the front end of one of the center benches. fire? exit the lab and proceed to the stairs nearest the Venable parking lot and Columbia Street. After exiting on the ground floor you should meet your TA on the far side of the driveway to the parking lot so that you can be included in a head count of those safely evacuate...

CHEM 101L QUESTIONS AND ANSWERS In the event the fire alarm for Morehead Laboratory sounds, you must evacuate the building. Assuming the emergency does not interfere with your best route, you should__________ . xit the lab and proceed to the stairs nearest the Venable parking lot and Columbia Street. After exiting on the ground floor you should meet your TA on the far side of the driveway to the parking lot so that you can be included in a head count of those safely evacuated, keeping the ...

CHEM 101 L Lab assignment 4 The Molar Mass