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100
List three extensive properties
Mass, volume, length
100
6.02 x 10^23 represents the number of atoms in 1 ____.
Moles
100
Describe the change that occurs between points B & C.
The kinetic energy is constant & potential energy increases (Solid to liquid)
100
Compound
100
Which of the following statements concerning the atom is false?
a. Chemical reactions involve only the electrons.
b. The atom contains protons, neutrons and electrons.
c. Protons are found in orbits about the nucleus.
d. The nucleus contains both protons and neutrons.
e. Most of the mass of the atom is found in the nucleus.
c. Protons are found in orbits about the nucleus.
200
List three intensive properties
Color, density, reactivity, state of matter, etc. (Any three)
200
What are three ways to increase the volume of a balloon?
The number of particles increases
Lower pressure outside balloon
Warm the balloon
200
Two gasses are placed in a container that reaches thermal equilibrium of 283 K. Describe the kinetic energy of the gasses.
Both gasses have the same average kinetic energy because they are at the same temperature
200
You decide to add more sugar to your drink. How can you dissolve more sugar?
Increase the temperature.
200
According to Kinetic molecular theory as temperature increases pressure increases because the particles move _________ colliding with the wall of the container _________ frequently.
Faster, more
300
What is evidence a chemical change occurred?
Color change, bubbles, temperature change, precipitate
300
Which sample would contain more atoms: 12g of C or 12g of Mg? Why?
12g of C, Carbon atoms have less mass ∴ 12g of each, the smaller atom sample will contain a greater number of atoms.
300
100 gram block of copper at 20 ∘C lowered into 100 grams of water at 100 ∘C. Heat will flow from ____ to ______ until it reaches ________?
The water to the copper until thermal equilibrium.
300
You are not allowed to eat sugar. You sneak some sugar into your tea. Your parents walk into the room, see the sugar, and ground you. List three things you could have done to avoid being grounded.
Crush the sugar (decrease the particle size)
Heat the water
Stir the tea
300
When a small volume of water is boiled, a large volume of steam is produced. Why?
The molecules are further apart for the steam.
400
Why can intensive properties be used to identify a substance?
They do not change based on amount
400
What is the volume of a balloon that contains 2 moles of carbon at 3 atm and 400 K?
21.89 L
400
Which graph best represents the best thermal equilibrium graph to represent mixing 200mL of 90°C water with 50mL of 20°C water?
C - there is a larger volume of the higher temperature water, the equilibrium temperature will be closer to the higher temperature water.
400
One of the methods of separating a mixture is distillation. What separates liquids in a distillation?
Boiling Point
400
List three physical properties and three chemical properties
Color, density, state of matter, solubility, melting point (Any three physical)
reactivity, combustibility, corrosivity, toxicity (Any three chemical)
500
Why can't extensive properties be used to identify a substance?
They change based on amount so it tells you almost nothing about composition without further study
500
What is the molecular mass of Sulfur dioxide (SO2)
64g
500
100 g of water was heated from 30*C to 80*C. The specific heat of water is 4.18 J/g*C.
20,900 J
500
Why does increasing the surface area of a solute increase the rate of dissolving?
It increases the chance for collisions to happen.
500
2 L of a 6 M solution of NaOH is made with how many moles?
12 mol