Which of the following properties is a chemical property?(1 point)
Responses
melting point
melting point
hardness
hardness
flammability
flammability
magnetism
flammability
Which of the following substances is a compound?(1 point)
Responses
gold (Au)
gold (Au)
carbon (C)
carbon (C)
oxygen (O)
oxygen (O)
water (H2
O)
water (H2O)
Which of the following substances is an element?(1 point)
Responses
salt
salt
protein
protein
insulin
insulin
hydrogen
hydrogen
Which of these properties is a chemical property?(1 point)
Responses
flammability
flammability
magnetism
magnetism
hardness
hardness
melting point
flammability
The chemical formula for methane is CH4
. What is the fixed ratio of carbon (C) to hydrogen (H)?(1 point)
Responses
4:5
4:5
1:1
1:1
1:4
1:4
1:5
1:4
To determine which of the properties listed is a chemical property, we need to understand the difference between chemical and physical properties.
Physical properties are characteristics of a substance that can be observed or measured without changing the chemical composition of the substance. Examples of physical properties include melting point, boiling point, hardness, and magnetism. These properties can often be determined through direct observation or simple experiments.
Chemical properties, on the other hand, involve the behavior of a substance when it undergoes a chemical change or reaction. They describe how a substance interacts with other substances to form new substances. Examples of chemical properties include flammability, reactivity, and toxicity.
Based on this information, the only property listed that is a chemical property is flammability. Flammability refers to the ability of a substance to burn or ignite when exposed to a flame or heat source. Unlike physical properties such as melting point, hardness, and magnetism, flammability indicates a chemical behavior and involves the transformation of the substance into different chemical compounds.