CHEMISTRY 11 – METRIC CONVERSION WORKSHEET
1) Convert the following:
(a) 3 s into milliseconds
ms
=
3
S
, n
x
3000ms
=
(b) 50.0 mL into litres
L
50.0mL
=
10¥
x
I
L
0.05
=
ml
(c) 250 mg into kilograms
kg
250mg
=
¥6
x
×
¥59
2.5×104 kg
=
(d) 0.25 Mg into milligrams
mg
=
0.25 Mg
x
f0kµ
×
, n
=
2.5×108
(e) 7 µs into milliseconds
ms
7µs
=
¥65
x
,¥s
×
2.5×108
=
mg
(f) 15 kg into centigrams
cg
15 kg
=
l¥g
x
x
TI
1.5×10 6cg
=
(g) 7 µs into milliseconds
ms
=
7µs
×
¥5 ¥1
x
=
7×103
ms
(h) 29 cg into megagrams
Mg
=
29cg
x
l¥gx
,#Bg
=
2.9×10 'Mg
mg
(i) 5 cg/ds into milligrams/second
Mots
=
(j) 2 mg/dL into grams per litre
(k) 4 cm/µs into kilometres/second
5dcTxnFxWFxtfdss.s00m9lsEfmtfxkmsgxfdE.o.o2gkknst.4mqlxl@mxnoYhmnxfYs-40km1sdqt.smTxl0Lg9xfdg9xgfd-soodgknest-5nstxl0jExoExlE.s
(l) 5 cg/mL into decigrams/litre
(m) 5 µL/s into millilitres/centiseconds
oinks
"
(n) 8 km/cL into decimetres/microlitre
note
=
THE
x
Esme
¥7 HE En
×
=
8dm
(o) 2 cL/ms into kilolitres/second
¥
=
fmtx
'
¥
×
,¥E× ¥5
=
2×02 us
al
2) Light travels at a rate of 3.00 x 108 m/s.
(a) It takes light 8.3 min to travel from the surface of the sun to the earth. What is the distance of
the earth from the sun?
m
8.3
=
pen
minx
x
¥808
1.494×10 'm
'
m
=
(b) The moon is 3.8 x 105 km from the earth. What time will pass between the instant an astronaut
on the moon speaks and the instant his voice is heard on earth? His voice travels by a modulated
laser beam at the speed of light.
s
=
3.8×105 Km
x
1¥
x
m=
¥5,08
1.275
(c) A robot vehicle is travelling on the surface of Mars while Mars and Earth are at their closest
approach (7.83 x 107 km). Suddenly, a video camera on the robot shows a yawning crevasse
dead ahead! How many minutes will it take for an electronic signal travelling at the speed of
light to go from Earth to Mars in order to tell the robot to stop immediately?
min
=
7.83×107 km
x
1,0¥ .gg#gm=4.3smin
÷
×