RolandoHerreraCHEM1311.08PRE
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Chemistry
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University
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Rolando Herrera
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Give an example(s) of a physical property
color and melting
combustability
rusting
none of the above
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Balance the following equation
C+O2 ------>CO
C+O2 ------>CO
C+O2 ------>2CO
C2+O2 ------>CO
2C+O2 ------>2CO
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
What is the empirical formula for the following equation
H2C2O4.
that is the empirical formula
H2C2O2.
HCO2.
H4C4O8.
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
How many significant figures in 523
3
2
1
4
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
What is the mass number of an iron atom that has 28 neutrons?
48
50
52
54
6.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Convert 200 degrees celcius to kelvin
300
473.15
200
515.75
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
What is the element with the symbol Cl
chlorine
Gold
Magnesium
Carbon
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