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trap
No points!
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seesaw
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gift
Win 10 points!
Okay!
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baam
Lose 25 points!
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15
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How many atoms are there in 2 moles of oxygen gas (O2)? (Avogadro's number = 6.002 x 10^23)
2.41 x 10^24 atoms
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20
×
Calculate the gravitational force on a 2 kg object on Earth (g = 9.8 m/s2)
F = mg = 2 x 9.8 = 19.6 N
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25
×
How many moles are in 36 g of H2O?
2
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15
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A box is pushed with a force of 10N and moves 5 m. How much work is done?
W = F x d = 10 x 5 = 50 J
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5
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A light bulb uses 60 W of power for 2 hours. How much energy does it consume?
E = P x t = 60 x 2 = 120 Wh
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thief
Give points!
5
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25
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gift
Win 20 points!
Okay!
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gift
Win 10 points!
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thief
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20
×
Calculate the molar mass of H2O.
18 g/mol
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10
×
A car travels 120 km in 2 hours. What is its average speed?
60 km/h
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trap
No points!
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star
Double points!
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fairy
Take points!
5
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15
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25
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baam
Lose 10 points!
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25
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Solve for y: 3y - 8 = 2y + 5
13
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5
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Solve for x: 2x + 5 = 15
5
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15
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If an object falls freely for 5 seconds, how far does it fall?
s = 1/2 x 9.8 x 5^2 = 122.5 m
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20
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What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-3 M?
pH = -log(1 x 10^-3) = 3
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20
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A shop offers a 20% discount on a $50 item. What is the final price?
40
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20
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A force of 15 N is applied to an object, causing it to accelerate at 3 m/s^2. Find its mass.
m = F/a = 15/3 = 5 kg
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