Science 9 MCU

Mole Concept

Motion 1

Motion 2

Mole Concept (P.S.)

Motion Problem Solving

100

To help chemists weigh atoms which are extremely small, they devised a counting unit called mole.

Mole is equivalent to ____ particles.

6.02x10²³

100

Which of the following is an example of a vector quantity?

A. 5 kg of rice C. 5 m/s heading North

B. 5 minutes doing DIY crafts D. 5 m/s

C. 5 m/s heading North

100

In free fall, what is the acceleration of an object when it is at its maximum height?

Gravity

100

Convert 72 g of Argon to moles:

1.80 mol

100

A construction worker accidentally drops a brick from a high scaffold. What is the velocity of the brick after 4 s?

-39.2 m/s

200

Which of the following is not true about the Mole Day celebration?

a. The Mole Day celebration aims to foster interest in chemistry.
b. The Mole Day celebration aims to recognize the significance of Avogadro’s number.
c. The Mole Day celebration is celebrated every 23rd of October from 6:22 a.m. to 6:22 p.m.
d. The Mole Day celebration is celebrated every 23rd of October from 6:02 a.m. to 6:02 pm.

c. The Mole Day celebration is celebrated every 23rd of October from 6:22 a.m. to 6:22 p.m.

200

What does the speedometer of a car measure?

A. speed C. velocity

B. acceleration D. speed and acceleration

A. speed

200

Which of the following equations is not included in impulse and momentum?

A. I = Ft C. Ft = mv_f-mv_i

B. I = 𝚫P D. a =v_f - v_t

D. a =v_f - v_t

200

Convert 2.40 mol of Dinitrogen (N₂) to mass (grams)

67.25 grams

200

A plane is being accelerated uniformly from rest at the rate of 5 m/s2 for 8.5 s. What final velocity does it attain?

42.5m/s

300

Butane (C₄H₁₀) is a hydrocarbon that burns easily and has no color or odor. Typically, it is utilized as heating fuel, a refrigerant, a propellant in aerosols, and fuel for portable stoves and cigarettes. What is the molar mass of C₄H₁₀?

58.12 g/mol

300

What is true about the acceleration of an object moving along a straight line with constant speed?

A. The magnitude of the acceleration of an object moving along a straight line with a constant speed is increasing.
B. The magnitude of the acceleration of an object moving along a straight line with a constant speed is decreasing.
C. An object moving along a straight line having a constant speed has zero acceleration.
D. The object is not moving at all.

C. An object moving along a straight line having a constant speed has zero acceleration.

300

What are the factors affecting the momentum of an object?

mass and velocity

300

Convert 4.81 × 10¹⁴ molecules of Ammonia (NH₃) to moles:

7.99 mol

300

BONUS

+300 :)

400

Which of the following is not true about mole as a collection of particles?

a. 1 mole of salt (NaCl) has 6.02 x 10²³ formula units.
b. 1 mole of water has 6.02 x 10²³ molecules of water.
c. 1 mole of carbon (C) has 6.02 x 10²³ atoms of carbon.
d. 1 mole of hydrogen (H) has 6.02 x 10²⁴ atoms of hydrogen.

d. 1 mole of hydrogen (H) has 6.02 x 10²⁴ atoms of hydrogen.

400

The speedometer of a car moving to the east reads 100 km/h. It passes another car that moves to the west at 100 km/h. What is true about the motion of the two cars?

A. Both cars have the same velocity.
B. Both cars are moving in the same direction.
C. Both cars have the same speed and the same velocity.
D. Both cars have the same speed, but they have opposite velocities.

D. Both cars have the same speed, but they have opposite velocities.

400

In free fall, what is the velocity of an object when it reaches the maximum height?

Zero

400

Cinnamic alcohol is used mainly in perfumery, particularly in soaps and cosmetics. Its formula is C₉H₁₀O. Calculate the percent composition of the compound.

Carbon (C): 80.56%

Hydrogen (H): 7.51%

Oxygen (O): 11.93%

400

How much force is needed to stop a 4,500 kg truck traveling at 25 m/s in 18 s?

-6,250 N

500

Who was the mole named after?

Amedeo Avogadro

500

If you get a traffic ticket for speeding, which of the following does not explain why it is because of your instantaneous speed and not your average speed?

A. It can not be due to your average speed since the traffic police do not know about your entire trip.
B. It is because of instantaneous speed because you were caught at that point in time where you were speeding.
C. It is because of instantaneous speed since the traffic police do not know your starting point or endpoint, or your initial speed.
D. None of the preceding

D. None of the preceding

500

In projectile motion, what happens to the horizontal velocity all throughout the motion?

remains constant

500

If the Molecular Formula of Sucrose is C₁₂H₂₂O₁₁, what is its Empirical Formula?

C₁₂H₂₂O₁₁

500

Mr. Tumamao and his family are on their way home after spending a two-day break at the beach, when suddenly, a passing carabao froze in front of their car’s headlights. Mr. Tumamao, driving at 11.4 m/s, immediately applies the brakes and slows with an acceleration of 3.8 m/s2. If the carabao is 20 m from the family’s car when the brakes are applied, will it hit the carabao?

17.1 m. No it will not hit the carabao