h h h
Choose the correct answer
h h h
1. ThehSIhunithofhtimehishthe
a) hour
b) second
c) minute
d) ampere
2. Thehdiameterhofhanhatomhishapproximatelyh1hh10-7h mm.hWhathishthishdiameterhwhenhexpressedhinhnanometers?
a) 1hh10-18hnm
b) 1hh10-15h nm
c) 1hh10-9h nm
d) 1hh10-1h nm
3. 6.0hkmhishhowhmanyhmicrometers?
a) 6.0hh106hµm
b) 1.7hh10-7h µm
c) 6.0hh109h µm
d) 1.7hh10-4h µm
4. ThehSIhprefixeshgigahandhmicrohrepresent,hrespectively:
a) 10-9h andh10-6.
b) 106h andh10-3.
c) 103h andh10-3.
d) 109h andh10-6.
5. Whichhofhthesehquantitieshrepresentshthehlargesthmass?
a) 2.0hh102hmg
b) 0.0010hkg
c) 1.0hh105h g
d) 2.0hh102h cg
6. Howhmanyhcubichcentimetersharehtherehinhexactlyhonehcubichmeter?
a) 1hh10-6hcm3
b) 1hh10-3h cm3
c) 1hh10-2h cm3
d) 1hh106h cm3
1
,7. Ammoniahboilshath-33.4C.hWhathtemperaturehishthishinh F?
a) -60.1F
b) -92.1F
c) -28.1F
d)h +13.5F
8. WhichhofhthehfollowinghishnothanhSIhbaseh unit?
a) Kilometer
b) Kilogram
c) Second
d) Kelvin
9. WhichhofhthehfollowinghSIhbasehunitshishnothcommonlyhusedhinh chemistry?
a) kilogram
b) kelvin
c) candela
d) mole
10. Whichhofhthehfollowinghprefixeshmeansh1/1000?
a) kilo
b) deci
c) centi
d) milli
11. Whichhofhthehfollowinghprefixeshmeansh1000?
a) kilo
b) deci
c) centi
d) milli
12. Converth-77Fhtohkalvinh?
a) 212.6hK
b) -212.6hK
c) -28.1hK
d)h+13.5hK
2
, 13. Thehnumberh0.0005678hexpressedhinhscientifichnotationhis:
a) 5.678hxh104
b) 5.67hxh10-7
c) 5.678hxh10-4
d) 5.678h 10-3
Explanation:hSincehthishnumberhishlesshthanhonehstarhmovinghthehdecimalhpointhtohthehrighthuntilhtherehishONEhnon-
hzerohnumberhtohthehlefthofhthehdecimalhpoint.hWritehthehresthofhthehnumberhashis.hWritehthehexponenthashthehnumberh
ofhplaceshthehdecimalhpointhwashmoved.
14. Whichhofhthehfollowinghishthehsmallesthdistance?
a) 21hm
b) 2.1hxh102h cm
c) 21hmm
d) 2.1hxh104h pm
Explanation:hEvenhthoughh2.1hxh104h ishthehlargesthnumberhinhthishquestion,hthehunitshofhpmh(picometers)harehtheh
smallesthunitshhere,hmakinghiththehsmallesthdistance.
15. Whathtemperaturehish95h°FhwhenhconvertedhtohdegreeshCelsius?
a) 63h °C
b) 35h °C
c) 127h°C
d) 15h°C
16. Whathtemperaturehish37h°Chwhenhconvertedhtohkelvin?
a) 310.15
b) 99hk
c) 236hk
d) 67.15
17. Whathtemperaturehish77hKhwhenhconvertedhtohdegreeshCelsius?
a) –296h°C
b) 105h°C
c) –196h°C
d) 25h°C
18. Expressh75hTghashpg
a) 0.75hpg
b) 75hX1024h pg
c) 0.75hpg
d) 75hX10-24h pg
3