How many miles does light travel in 1 microsecond in a vacuum? (The speed of light in a vacuum is 186 000 miles/second.)
A) 0.000 186 miles
B) 0.186 miles
C) 186 miles
D) 1.86 miles
The density of aluminum is 2.70 g/cm3. What is the mass of a cube of aluminum 1.0 cm on each edge?
A) 27.0 g
B) 5.4 g
C) 81 g
D) 2.70 g
If 20 gits equal 1 erb, and 1 futz equals 2 hews, and 10 erbs equal 1 futz, how many gits equals hews?
A) 100 gits
B) 50 gits
C) 500 gits
D) 1000 gits
What are the missing coefficients for the skeleton equation below?
Al2(S04)3(aq) + KOH(aq) ~ Al(OH)3(aq) + K2S04(aq)
A) 2,12,4,6 B) 1,3,2,3 C) 2,3,1,1
D) 1,6,2,3 E) 4,6,2,3
When the equation for the complete combustion of ethanol, C2HSOH, is balanced, what is the coefficient for oxygen?
A)1
B)6
C)3
D)14
E) 7
Use the activity series of metals to write a balanced chemical equation for the following single replacement reaction:
Ag(s) + KN03(aq) ~
A)Ag(s) + KN03(aq) ~ AgN03 + K
B)Ag(s) + KN03(aq) -+ Ag + K + N03
C)Ag(s) + KN03(aq) -+ AgK + N03
D)Ag(s) + KN03(aq) ~ AgKN03
E) No reaction takes place because silver is less reactive than potassium.
2006-12-19
16:58:05
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5 answers
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asked by
James O
1
in
Chemistry