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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?
ice melting
Some of the products of the reaction were given off as a gas.
a different molecule with different properties is formed
a metal railing rusting in damp weather
physical and chemical changes
Austin uses only physical changes to separate the mixture’s components
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
Matter can undergo physical and chemical changes. A physical change is a change of matter from one form to another without a change in the identify of the substance. Which process is an example of a physical change?
ice melting
Some of the products of the reaction were given off as a gas.
a different molecule with different properties is formed
a metal railing rusting in damp weather
physical and chemical changes
Austin uses only physical changes to separate the mixture’s components
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
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?
ice melting
Some of the products of the reaction were given off as a gas.
a different molecule with different properties is formed
a metal railing rusting in damp weather
physical and chemical changes
Austin uses only physical changes to separate the mixture’s components
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
There are several differences between chemical and physical changes. Which process is an example of a chemical change?
ice melting
Some of the products of the reaction were given off as a gas.
a different molecule with different properties is formed
a metal railing rusting in damp weather
physical and chemical changes
Austin uses only physical changes to separate the mixture’s components
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
Pablo notices that ice cream begins to melt when left out at room temperature. What is Pablo observing?
ice melting
Some of the products of the reaction were given off as a gas.
a different molecule with different properties is formed
a metal railing rusting in damp weather
physical and chemical changes
Austin uses only physical changes to separate the mixture’s components
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
Which types of changes observe the law of conservation of mass?
ice melting
Some of the products of the reaction were given off as a gas.
a different molecule with different properties is formed
a metal railing rusting in damp weather
physical and chemical changes
Austin uses only physical changes to separate the mixture’s components
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
A molecule is involved in a chemical reaction, causing the arrangement of its atoms to change. What is the result of this process?
ice melting
Some of the products of the reaction were given off as a gas.
a different molecule with different properties is formed
a metal railing rusting in damp weather
physical and chemical changes
Austin uses only physical changes to separate the mixture’s components
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
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,
ice melting
Some of the products of the reaction were given off as a gas.
a different molecule with different properties is formed
a metal railing rusting in damp weather
physical and chemical changes
Austin uses only physical changes to separate the mixture’s components
The mass does not change because chemical changes observe the law of conservation of mass.
physical change
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