| Solid, liquid, or gas? | Vocabulary | Physical or chemical? | Percent by Mass | Law of Conservation of Mass |
| 10 | 10 | 10 | 10 | 10 |
| 20 | 20 | 20 | 20 | 20 |
| 30 | 30 | 30 | 30 | 30 |
| 40 | 40 | 40 | 40 | 40 |
| 50 | 50 | 50 | 50 | 50 |
| Final Question | ||||
No definite shape or volume
No definite shape or volume
Gas
Usually the most dense of the three.
Usually the most dense of the three.
Solid
Takes the shape of its container.
Takes the shape of its container.
Liquid and Gas
gas
Made of particles held in a specific arrangement.
Made of particles held in a specific arrangement.
Solid
The process of separating a liquid from a solid using a porous barrier.
The process of separating a liquid from a solid using a porous barrier.
filtration
Define an independent variable.
Define an independent variable.
The thing that the experimenter is manipulating or testing.
Something in which samples taken will differ from one another.
Something in which samples taken will differ from one another.
heterogeneous mixture
State the Law of Definite Proportions.
State the Law of Definite Proportions.
A compound is always composed of the same elements in a the same proportion by mass.
A process by which components of a mixture are separated by their attraction to a certain substance.
A process by which components of a mixture are separated by their attraction to a certain substance.
Chromotagraphy
Barium melts at 725 degrees celcius.
Barium melts at 725 degrees celcius.
physical
phase change
phase change
physical
change in odor, texture, color, or substance
change in odor, texture, color, or substance
chemical
Mixing a cake
Mixing a cake
physical
Baking a cake
Baking a cake
chemical
A 2.89-g sample of sulfur reacts with 5.72 g of copper to form a black compound. What is the % of copper in the compound?
A 2.89-g sample of sulfur reacts with 5.72 g of copper to form a black compound. What is the % of copper in the compound?
66.4%
A 78.0 g sample of an unknown compound contains 12.4 g of hydrogen. What is the percent by mass of hydrogen in the compound?
A 78.0 g sample of an unknown compound contains 12.4 g of hydrogen. What is the percent by mass of hydrogen in the compound?
15.9%
You have 75 g of FeO. if 69.95% of the compound is iron, how many grams of iron is there in the compound?
You have 75 g of FeO. if 69.95% of the compound is iron, how many grams of iron is there in the compound?
52.46 g
A 134.50-g sample of aspirin is made up of 6.03 g of hydrogen, 80.70 g of carbon, and 47.77 g of oxygen. What is the percent by mass of each element in aspirin?
A 134.50-g sample of aspirin is made up of 6.03 g of hydrogen, 80.70 g of carbon, and 47.77 g of oxygen. What is the percent by mass of each element in aspirin?
4.48% hydrogen; 60.0% carbon; 35.52% oxygen
All you know about 2 compounds is they contain the same % by mass of carbon. With only this information, can you be sure the 2 compounds are the same? Explain.
All you know about 2 compounds is they contain the same % by mass of carbon. With only this information, can you be sure the 2 compounds are the same? Explain.
No, you cannot. You don't know the % of the other elements in the compounds, so you cannot be sure of the ratios.
State the Law of conservation of mass.
State the Law of conservation of mass.
Mass cannot be created nor destroyed.
When burning 180 g of glucose in the presence of 192 g of oxygen, water and carbon dioxide are produced. If 108 g of water is produced, how much CO2 is produced?
When burning 180 g of glucose in the presence of 192 g of oxygen, water and carbon dioxide are produced. If 108 g of water is produced, how much CO2 is produced?
264 g
A substance breaks down into its component elements when it is heated. If 68 g of the substance is present before it is heated, what is the combined mass of the component elements after heating?
A substance breaks down into its component elements when it is heated. If 68 g of the substance is present before it is heated, what is the combined mass of the component elements after heating?
68 g
If 45.98 g of sodium combines with an excess of chlorine gas to form 116.89 g of sodium chloride, what mass of chlorine will be used in the reaction?
If 45.98 g of sodium combines with an excess of chlorine gas to form 116.89 g of sodium chloride, what mass of chlorine will be used in the reaction?
70.91 g
A 13.0 g sample of X combines with a 34.0 g sample of Y to form the compound XY2. What is the mass of the reactants?
A 13.0 g sample of X combines with a 34.0 g sample of Y to form the compound XY2. What is the mass of the reactants?
47.0 g
Cassiterite is mined as a commercial source of tin. It is a compound of the elements tin and oxygen. A 1.0 kg sample of pure cassiterite mined in Germany contains 788 g of tin. Is it possible to predict the mass of tin contained in a 43.5 g sample of casiterite mined in South America? Explain.
Cassiterite is mined as a commercial source of tin. It is a compound of the elements tin and oxygen. A 1.0 kg sample of pure cassiterite mined in Germany contains 788 g of tin. Is it possible to predict the mass of tin contained in a 43.5 g sample of casiterite mined in South America? Explain.
Yes, it is. The law of definite proportions says they will have the same percent by mass of each element.
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