States of Matter
Anything that has mass and takes up space.
What is matter?
physical properties/changes can be observed without changing the ___________ of the matter.
What is identity/composition?
A mixture that has a uniform, unchanging composition.
What is homogenous? (will accept solution)
Cannot be separated into simpler substances by either chemical or physical means.
What is an element?
A(n) __________________ property is one that is not dependent on the sample size.
What is intensive?
__________ is the amount of space taken up by an object.
Volume
volume is an example of a(n) _____________ property.
What is extensive?
The product(s) in the following equation:
H2 + O2 --> 2H2O
What is 2H2O?
What is a group?
Water condensing on a glass is a physical change. Tell me why.
Phase changes/state of matter changes are physical. Composition of the water in unchanged.
State of matter in which atoms are free moving.
What is gas?
The property that stays the same during both physical and chemical changes.
What is mass?
Technique used to separate different components of crude oil.
What is distillation?
What is a compound?
Which of the following is NOT a physical property?
-Iodine is purple in color
-Water boils at 100C
-Silver has a density of 10.49g/cm3
-Potassium ignites when dropped in water
What is, potassium ignites when dropped in water?
Incompressible and atoms that flow past one another.
What is a liquid?
What are the five major signs of a chemical change?
What are color change, formation of precipitate, formation of bubbles, gas, and light production. (would also accept temp change)
Form of separation that occurs when a solid turns directly into a gas.
What is sublimation?
A compound is always composed of the same elements in the same proportion by mass.
What is the law of definite proportions?
Determine the mass of Carbon. Using that information, find out the percent by mass of carbon in 44g of carbon dioxide (CO2)
Round to the nearest whole number.
What is 27%?
Vibrating atoms.
What is 24.1g of chlorine?
This separation technique can be used in drug testing urine or blood to separate out illegal substances.
What is chromatography?
Two unknown compounds are tested. Compound 1 contains 15.0 g of hydrogen and 120.0 g of oxygen. Compound 2 contains 2.0 g of hydrogen and 32.0 g of oxygen. Are the two compounds the same? Why or why not?
No, the ratios are not the same.
Compound 1= 1:8
Compound 2 = 1:16
How many grams of NaBr are needed to make 50g of a 5.0% solution?
x/50 = .05
x = 2.5g