Physical and Chemical
What is evidence a chemical change occurred?
What is color change, bubbles, temperature change, precipitate?
List three physical properties
What is color, density, state of matter, solubility, melting point?
2 L of a 6 m solution of NaOH is made with how many moles?
What is 12 moles?
Which sample would contain more atoms: 12 grams of C or 12 grams of Mg? Why?
12 Grams of C, carbon atoms have less mass. 12 grams of each, the smaller atom sample will contain a greater number of atoms
Why does increasing the surface area of a solute increase the rate of dissolving?
It increases the chance for collisions to happen
List three intensive properties
What is color, density, reactivity, state of matter?
Why can intensive properties be used to identify a substance?
They do not change based on amount
100 grams of water were heated from 30*c to 80*c. The specific heat of water is 4.18 J/g*c
What is 20,900 J?
6.02 x 10^23 represents the number of atoms in 1___
What is moles?
What are three ways to increase the volume of a balloon?
the number of particles increase
lower pressure outside balloon
warm the balloon
List three extensive properties
What is mass, volume, length?
When a small volume of water is boiled, a large volume of steam is produced. Why?
The molecules are further apart for the steam
What is the volume of a balloon that contains 2 moles of carbon at 3 atm at 400k?
What is 21.89 L?
What statement concerning the atom is false?
a. chemical reactions involve only the electrons
b. the atoms contain 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
What is c?
Two gasses are placed in a container that places thermal equilibrium of 283K. Describe the kinetic energy of the gasses.
Both gasses have the smae average kinetic energy because they are at the same temperature
An iron nail is suspended on a thin wire in a sealed jar of moist air. The surface of the nail becomes red over time. What chemical change has occured?
What is oxidation?
Why cannot extensive properties be used to identify a substance?
They do change based on amount so it tells you almost nothing about composition without further study
A sample of Calcium has a mass of 80g, how many moles are present?
What is 2 moles ca?
What is the molecular mass of Sulfur Dioxide?
What is 64 grams?
According to kinetic molecular theory as temperature increases pressure increases because the particles move________colliding with the wall of the container______frequently.
What is Faster, More?
You are not allowed to eat sugar. You sneak some sugar into your tea. Your parents walk into your room, see the sugar, and ground you. List three things you could have done to avoid being grounded:
Crush the Sugar
Heat the Water
Stir the Tea
Now that you have being avoided being grounded you get greedy and have decided to add more sugar to the drink. How can you dissolve more sugar?
What is increase the temperature?
To find how many grams are in 3.05 moles of calcium, what conversions would I need to use?
What is molar mass?
Which has more mass? 2 moles of iron or 2 moles of zinc?
What is 2 moles of zinc?
According to the kinetic theory of gasses, the average kinetic energy of the gas particles in a gas sample is directly proportional to the.....
What is temperature?