This or That
A rotting apple
Chemical Change
21.3 g of Silver combines with Sulfur to create 81.1 g of AgS. How much sulfur was used?
81.1 - 21.3 = 59.8 g AgS
Anything tangible
Material
Unit of energy versus metabolism unit for energy
Joule (J) and Calorie
State of matter with no definite shape or volume
Gas
The density of water - Intensive or Extensive?
Intensive, doesn't matter how much water I have. The density is always the same!
Carbon and oxygen make up 2 compounds, CO and CO2 . Carbon weighs 12 g and oxygen weighs 16 g and 32 g respectively. Does this follow the Law of Multiple Proportions?
Yes, because the ratio of each compound is increasing at a fixed ratio.
Liquid to Gas
Vaporization
High to low temperature.
Salt dissolved in water. Heterogeneous or Homogeneous?
Homogeneous
Conductivity, Intensive or Extensive?
Intensive, doesn't depend on how much of something you have.
1.01 g of sodium (Na) reacts with 17.3 g of chlorine (Cl) forming table salt, NaCl.
What are the reactants and products?
How much NaCl is formed?
18.31 g NaCl
Anything that takes up space or has mass
Matter
Going from a solid to a liquid to a gas. How is temperature changing from state to state?
Temperature is increasing! More energy.
Table salt. Element or compound?
Compound
Mercury vaporization. Chemical or Physical?
Physical, it's just a phase change from liquid to gas.
A 181 g sample of Advil is made up of 81.9 g of oxygen, 62.1 g of carbon, and 37 g of hydrogen. What is the percent composition of each element?
(81.9 / 181) x 100 = 45%
(62.1 / 181) x 100 = 34%
(37 / 181) x 100 = 20%
Define an element versus a compound.
Element - something on the Periodic Table, can't be broken down into anything smaller.
Compound - 2 or more elements together.
State of matter with the most energy (Solid, Liquid, Gas).
Gas
Baking a cake. Chemical of Physical?
Chemical
Flowers growing. Chemical or Physical?
Chemical, putting water + sun = energy for plant!
A 436 g sample of a substance is composed of 29.3% Silver and 70.7% Carbon. How many grams of each are present?
Remember sig fig rules.
128 g Silver and 308 g Carbon
436 g x .293 = 128 g
426 g x .707 = 308 g
Going from a solid to a gas. (Dry ice!)
Sublimation
State of matter that makes up 99% of visible matter in our universe.
The ocean. Heterogeneous or Homogeneous?
Heterogeneous.
Not just salt water, also organisms and trash etc.