Question

Help with chemistry: Precision, Significant Figures, and Scientific Notation...want clarifications before I take my quiz

Answer 1

Read the volume of fluid in the graduated cylinder above. Hint: Note that each interval is equal to 0.2 mL

8.7 mL
8.9 mL
8.8mL
9 mL
???...

Answer 2

@myininaya...can you please help me??

Answer 3

8,75 mL

Answer 4

do you mean 8.7 mL because that is one of the options....how did you get it?? :/

Answer 5

Wel, it is calibrated on middle of the "circle". Its beween 8,8 and 8,6 so its 8,7 then

Answer 6

yeah okay because the first time I got 8.8 and that was wrong....like I just subtracted 9-2.0

Answer 7

I meant 0.2* =8.8 mL

Answer 8

The meniscus is below 8,8 so 8,8 could not be the right answer

Answer 9

um do you have time for 4 more...I'm trying to understand the questions I got wrong so I can retake my quiz and pass

Answer 10

Uhm, what are the questions?

Answer 11

Read the volume of fluid in the graduated cylinder above.
68 mL
68.0mL
69 mL
69.0 mL

Answer 12

Which of the following could be a correct measurement using the full precision available for this balance
24.0 g
24.00 g
24 g
24.0000 g

Answer 13

Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value.
(1.8 x 10-2) ÷ (9 x 102) = _____
the -5 and -4 are exponents
2 x 10-5
2.0 x 10-5
0.2 x 10-4


The number 7.325 rounded off to three significant figures is....I got 7.32??? but it was wrong:/

Answer 14

You only can say something about 68, 70 , 72 , etc..
with the second one you can say 24,1 , 24,2 etc.

and with significant (1 significant ; 0,5 = 1 | 0,4 = 0)