** I need help with these questions! Thank you** I will rate you! ected data to

Question

** I need help with these questions! Thank you** I will rate you!

ected data to determine the density of a liquid. Examine their data tables and T accuracy and precision. The actual true value of the density of the liquid is ine the level of 1.2567g/ml GROUP A DENSITY g/mL 1.2760 1.4977 1.2169 0.9988 AVG. 1.2474g/ml GROUP B DENSITY g/mL 1.3567 1.3560 1.3562 1.3561 AVERAGE 1.3562g/mL a. Group A is both accurate and precise b. Group B is both accurate and precise c. Group A is accurate but not precise d. Group B is accurate and not precise 2. What measuring instrument is used in a titration a. Graduated cylinder b. Erlenmeyer flask. c. buret. d. syringe. 3. There is a container on the lab bench containing some unknown chemical. You should: a. Dump it, wash the glassware. Some c. Leave it. The rightful owner will claim people are slobs. it eventually Find your lab supervisor and ask what to do b. Move it out of the way in case it is d. dangerous. Otherwise, not your problem. All of the following are designated as glassware designed to contain (TC) chemical systems except a. graduated cylinder b. Flask If the flame of a Bunsen burner is yellow and smoky it means a. the flame needs more air b. the flame needs more gas 4. e. test tube d. beaker 5. c. the flame will also be noisy d. the flame is burning satisfactorily A filtrate is a. a residue b. 6. c. a precipitate d. the liquid that passes through a filter paper the solution before being filtered 7. All of the following would be considered general safety procedures for all labs except a. dispose of heavy metals in waste b. wear closed toed shoes c. wear goggles d. tie back long hair

Explanation / Answer

1. As we can see from the table of values found out by both groups, we find that the value found by group A are closer to the actual value that found by group B. Both groups have same precision.

2. Erlenmeyer flask is used in titrations.

3. The best thing to do when you find an unknown chemical in the lab is to find your lab supervisor and ask him/her what to do.

4. All of the given apparatus except test tubes are designed to contain chemical systems.

5. A yellow and smoky flame from Bunsen burner means that the flame needs more air.

6. Filtrate is the liquid that passed through the filter paper.

7. Disposing heavy metals in waste is not a general safety procedure.

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.