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15
×
Write the formula to calculate the molar mass of CaCO3.
M(CaCO3) = M(Ca) + M(C) + 3M(O)
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15
×
Janus is the god of what?
doorways
beginnings
endings
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25
×
January's zodiac signs are?
scorpio and cancer
taurus and libra
capricorn and aquarius
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trap
No points!
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fairy
Take points!
5
10
15
20
25
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fairy
Take points!
5
10
15
20
25
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banana
Go to last place!
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15
×
What kind of oxide is calcium oxide (CaO)?
acidic oxide
basic oxide
amphoteric oxide
neutral oxide
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25
×
Which statement is correct about exothermic reaction?
Chemical equation: Reactants + Energyâ Products
Instant coldpack is an application of an exothermic reaction
Release energy in the form of heat or light
Produces a decrease in temperature
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trap
No points!
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star
Double points!
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rocket
Go to first place!
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thief
Give points!
5
10
15
20
25
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banana
Go to last place!
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magnet
Take 25 points!
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shark
Other team loses 20 points!
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baam
Lose 5 points!
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banana
Go to last place!
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magnet
Take 25 points!
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rocket
Go to first place!
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lifesaver
Give 10 points!
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15
×
What gas does not cause acid rain?
H2
SO2
NOx
CO2
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15
×
Which formula is INCORRECT?
m = n x M
M = n x m
n = m : M
n = V : 24.79
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10
×
What is the denotation of the number of moles of 1 substance?
n
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15
×
Dissolve salt into water. Water is called...
solubility
solvent
solute
solution
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10
×
Dissolve sugar into water. Which is solute?
sugar
water
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15
×
According to Archimede, buoyant force acting on an object immersed in a fluid ....... weight of fluid displaced
equal to
less than
larger than
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10
×
How many days are in January?
28
30
31
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