1. A 5.75 mL sample of mercury has a measured mass of 77.05 g. The density is __
ID: 912996 • Letter: 1
Question
1. A 5.75 mL sample of mercury has a measured mass of 77.05 g. The density is ___________
2. Mercury’s accepted density is 13.53 g·mL-1. The % error in your measurement is: ____________
3.
Is this person accurate? ____ Is the person precise? ___
Defend your answer!
4.
This molecule contains ____ elements and ____ atoms.
Carbon=black Oxygen=Red White=Hydrogen
The molecular formula for this substance is: ___________
5. Calculate the number of seconds in 5.25 years using unit analysis: (1 year = 365.25 days)
6. A calculator displays the answer to a problem as 53.29841
Report this answer to:
_______________ 5 significant figures
_______________ 3 significant figures
_______________ 1 significant figure
7.
Which letter(s) represents: a) compound ____ b) pure element ____ c) Mixture of elements ____
d) Mixture of compounds _____ e) a solid element ____
Is this person accurate? ____ Is the person precise? ___
Defend your answer!
Explanation / Answer
volume = 5.75ml
mass = 77.05gm
density = mass/volume
= 77.05/5.75
= 13.4gm/ml
Mercury accepted density is 13.53g/ml
% error = (13.53-13.4)*100/13.53
=0.96%
3. is this person accurate -No (not on the bull's eye)
Is the person precise Yes (closely grouped)
This molecule contains 3(C,H&O) elements and 12 atoms.
The molecular formula of the substance is C3H6O3
4. 5.25 years
1 year = 365 days
1 day = 24 hours
1 hour = 60 min
1 min = 60 seconds
5.25 years = 5.25*365*24*60*60 = 165677400 sec = 1.66*10^8 sec
6. 53.298 5 significant figures
53.3 3 significant figure
50 1 significant figure
7. a. compound --- c
b. pure element ---e
c. mixture of elements --e
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.