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Which types of changes observe the law of conservation of mass?
Austin uses only physical changes to separate the mixture’s components
Some of the products of the reaction were given off as a gas.
a metal railing rusting in damp weather
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
an increase in temperature
a different molecule with different properties is formed
physical and chemical changes
Alison finds the total mass of a sample of baking soda, a balloon, and a glass container with vinegar in it. She adds the baking soda to the vinegar and immediately places the balloon over the mouth of the container. After the reaction is complete,
Austin uses only physical changes to separate the mixture’s components
Some of the products of the reaction were given off as a gas.
a metal railing rusting in damp weather
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
an increase in temperature
a different molecule with different properties is formed
physical and chemical changes
There are several differences between chemical and physical changes. Which process is an example of a chemical change?
Austin uses only physical changes to separate the mixture’s components
Some of the products of the reaction were given off as a gas.
a metal railing rusting in damp weather
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
an increase in temperature
a different molecule with different properties is formed
physical and chemical changes
When paper is burned, the mass of the remaining ash is less than the mass of the original paper. Which statement best explains this result?
Austin uses only physical changes to separate the mixture’s components
Some of the products of the reaction were given off as a gas.
a metal railing rusting in damp weather
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
an increase in temperature
a different molecule with different properties is formed
physical and chemical changes
Rita wants to make some toast for breakfast, which she knows involves a chemical change to the bread. She puts a slice of bread in the toaster, but, after 10 minutes, she notices that the sides of the bread are black. What caused this chemical change
Austin uses only physical changes to separate the mixture’s components
Some of the products of the reaction were given off as a gas.
a metal railing rusting in damp weather
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
an increase in temperature
a different molecule with different properties is formed
physical and chemical changes
In the laboratory, Austin is given a mixture of iron filings, sand, and salt. To separate the mixture, Austin uses a magnet, boiling water, and a filter. Which statement is true about the process Austin uses to separate this mixture?
Austin uses only physical changes to separate the mixture’s components
Some of the products of the reaction were given off as a gas.
a metal railing rusting in damp weather
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
an increase in temperature
a different molecule with different properties is formed
physical and chemical changes
Gallium is a metal. If you hold a solid piece of pure gallium in your hand, your body warmth will melt the gallium. What is this an example of?
Austin uses only physical changes to separate the mixture’s components
Some of the products of the reaction were given off as a gas.
a metal railing rusting in damp weather
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
an increase in temperature
a different molecule with different properties is formed
physical and chemical changes
A molecule is involved in a chemical reaction, causing the arrangement of its atoms to change. What is the result of this process?
Austin uses only physical changes to separate the mixture’s components
Some of the products of the reaction were given off as a gas.
a metal railing rusting in damp weather
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
an increase in temperature
a different molecule with different properties is formed
physical and chemical changes
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