Chemical Reactions
Fill in the blanks:
In a chemical reaction, matter is neither _____________ nor _____________.
In a chemical reaction, matter is neither created nor destroyed.
Name 1 example that shows a chemical change has occurred.
Correct responses include: a change in color, smell produced, new substance produced, precipitate produced, gas produced (bubbles)
How much force is required to accelerate a 2kg car at 30m/s2?
60N
Newton's 3rd Law states that with every __________ there is an equal and opposite __________.
action; reaction
How many atoms are in the following chemical formula?
H2O
3
H - 2
O - 1
Ms. Donihoo bakes a cake. Once the cake is baked, what would be 2 ways we can observe a chemical change has occurred?
Change in color, smell produced, cannot be reversed, new substance produced
How much force is required to accelerate a 60kg car at 54m/s2?
3,240N
A student pushes a box with a force of 5 N to the right. Another student pulls the box with 13 N also to the right.
What direction will the box move and with how much force?
18N to the right
How many atoms are in the following chemical formula?
C6H12O6
24 atoms
C - 6
H - 12
O - 6
According to the law of conservation of mass, when a chemical reaction occurs, the mass of the reactants is the same/greater than/less than the mass of the products.
The same as! When a reaction occurs, the reactants and the products should have the same mass.
What is the acceleration of a 6000kg rocket being pushed off the ground with 30,000N of force?
5 m/s2
A student pushes a box with a force of 20 N to the left. Another student pushes the same box from the opposite side with a force of 7 N to the right.
What direction will the box move and with how much force?
13N left
How many atoms are in the following chemical formula?
4H2SO4
28
H - 2 x 4 = 8
S - 1 x 4 = 4
O - 4 x 4 = 16
The only definite way we can tell a chemical reaction has occurred is...
A new substance is produced.
What is the acceleration of a 4kg basketball being thrown with 200N of force?
50 m/s2
A rocket is thrusted UP off of the ground with 120N of force. The weight of the rocket pulls the rocket DOWN with 100N of force and the drag of the rocket's movement pulls the rocket DOWN with 20N of force. Will the rocket make it off the ground?
No, the rocket will not make it off the ground. While the rocket is blasting off with 120N of force, this is not enough to overcome the weight and drag forces (120N).
Does the following equation follow the law of conservation of mass?
CH4 + 2O2 -------> CO2 + 2H2O
Yes! There are the same amounts of each atom on either side of the equation.
What is a precipitate?
A precipitate is a solid that forms as a byproduct of a chemical reaction. This is often represented in liquid reactions, where a leftover solid is created by the liquid.
A baseball accelerates at 67 m/s2 when hit with 80N of force. What is the mass of the baseball?
1.19 kg
A teddy bear is sitting on the dash of a car. The driver slams on their brakes. What will happen to the teddy bear? Which of Newton's laws is demonstrated by this scenario?
The teddy bear will fly forward, toward the windshield. This is demonstrated by Newton's First Law - the Law of Inertia.