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10
×
How many days are in January?
31
30
28
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25
×
What is indicator?
A compound that changes color at a specific pH value or in the presence of a particular substance
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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
×
In Latin January is for...
Cold
Janus
doorway
exit
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15
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State formula to calculate density of an object.
density = mass : volume
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15
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What kind of oxide is calcium oxide (CaO)?
basic oxide
amphoteric oxide
neutral oxide
acidic oxide
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15
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Which formula is INCORRECT?
M = n x m
n = V : 24.79
n = m : M
m = n x M
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10
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What is the denotation of the number of moles of 1 substance?
n
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15
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Dissolve salt into water. Water is called...
solubility
solution
solvent
solute
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10
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Dissolve sugar into water. Which is solute?
sugar
water
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15
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According to Archimede, buoyant force acting on an object immersed in a fluid ....... weight of fluid displaced
equal to
larger than
less than
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25
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Which statement is correct about exothermic reaction?
Instant coldpack is an application of an exothermic reaction
Chemical equation: Reactants + Energyâ Products
Release energy in the form of heat or light
Produces a decrease in temperature
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heart
Other team wins 5 points!
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star
Double points!
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rocket
Go to first place!
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lifesaver
Give 5 points!
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lifesaver
Give 15 points!
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gold
Win 50 points!
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fairy
Take points!
5
10
15
20
25
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thief
Give points!
5
10
15
20
25
×
lifesaver
Give 20 points!
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seesaw
Swap points!
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rocket
Go to first place!
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banana
Go to last place!
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20
×
List 2 factors that affect to the rate of a reaction.
Concentration, Surface area, Temperature, Catalyst
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