Unit 2 chemistry
When paper becomes a yellow brown color upon exposure to sunlight what type of changes likely taking place
A chemical change
The following cannot be classified as a substance
Air
Weather in product dissolve and lakes and streams
Ambiguous
Ammonia is a gas at room temperature, but can be pressurized to liquid form. Which of the following correctly describes a property of ammonia gas?
Ammonia guess is more compressible than liquid ammonia
Which substance cannot be decomposed into simpler substances
An element
Which of the following is classified as an ambiguous change
Dissolving
Rank the following substances for most compressible Tillies compressible with all of substances are at room temperature and standard atmospheric pressure
Helium water silver
Granite is a ______ mixture
Heterogeneous
Sweet tea is a ______ mixture
Homogeneous
A compound differs from the mixture and then a compound always has a
Homogeneous composition
What are the diatomic elements
Iodine, bromine, chlorine, fluorine, oxygen, nitrogen, hydrogen
Which of the following is a chemical property of hydrogen?
It burns and oxygen to form water
Which statement describes a chemical property
It reacts with hydrogen to for my gas
Which of the following is considered a physical property of copper
It's boiling point is 2562°C
The elements in a compound
Lose most of the chemical and physical properties
Under the same conditions of temperature and pressure a liquid differs from a gas because the particles of a liquid
Occupy a definite volume
Over many years rocks mechanically weather away
Physical
Paper is ripped into shreds
Physical
The following change is a chemical change
Rusting
Which of the following household items as not a pure compound
Salad dressing
Which of the following substances cannot be broken down into simpler substances by chemical means
Sulfur
Which statement represents a conclusion rather than an experimental observations
The gas is carbon dioxide
Which property is not an intensive property
The mass of a substance is 100 g
Which property of liquids best explains why liquids can be measured in so many different types of devices
The particles in a liquid take the shape of the container while maintaining a constant volume
The following statements are true about solids
The particles of a solid vibrate but cannot move past each other and a solid has a fixed volume and I think she
What must occur for a process to be a chemical reaction
The process must involve a change in Chemical properties
Many thermometers use liquid mercury due to its accuracy and measuring the temperature. However, environmental concerns and wreck your exposure have led to a decrease to use. Which of the following is true of liquid mercury
The volume of mercury does not change when transfer to a smaller thermometer
Which of the following is an extensive property of a glass block
Volume
Petroleum is classified chemically as a
mixture
Which of the following is a diatomic elements
Chlorine
Physical properties of a substance include
Color and odor. Melting and boiling points. Density and hardness.
The characteristic of compounds is that the components are
Combined in a definite proportion
Conclusion or statement? When the powder is mixed with water it dissolves
Conclusion
Under the same conditions of temperature and pressure, a gas differs from a liquid because the particles of the gas
Are in a constant straight-line motion
A piece of sterling silver tarnishes
Chemical
Dynamite explodes
Chemical
