Which of the following properties is a chemical property?(1 point)
Responses
magnetism
magnetism
hardness
hardness
flammability
flammability
melting point
flammability
Which of the following substances is a compound?(1 point)
Responses
gold (Au)
gold (Au)
oxygen (O)
oxygen (O)
carbon (C)
carbon (C)
water (H2
O)
water (H2O)
Which of the following substances is an element?(1 point)
Responses
salt
salt
hydrogen
hydrogen
insulin
insulin
protein
hydrogen
Which of these properties is a chemical property?(1 point)
Responses
melting point
melting point
magnetism
magnetism
flammability
flammability
hardness
flammability
The chemical formula for methane is CH4
. What is the fixed ratio of carbon (C) to hydrogen (H)?(1 point)
Responses
1:4
1:4
4:5
4:5
1:5
1:5
1:1
1:4
To determine which of the given properties is a chemical property, we need to understand the difference between chemical and physical properties.
A chemical property is a characteristic of a substance that can only be observed or measured during a chemical reaction or a chemical change. These properties describe how a substance interacts or reacts with other substances to form new substances.
On the other hand, a physical property is a characteristic of a substance that can be observed or measured without changing the chemical composition of the substance. These properties include things like appearance, odor, melting point, boiling point, density, and others.
Now, looking at the given options: magnetism, hardness, flammability, and melting point, we can eliminate magnetism and hardness as chemical properties. Magnetism and hardness are physical properties that can be observed without needing a chemical change to occur.
This leaves us with two options: flammability and melting point. Flammability is a chemical property because it describes how a substance can ignite and burn in the presence of oxygen. Melting point, on the other hand, is a physical property as it simply indicates the temperature at which a substance changes from a solid to a liquid state.
Therefore, the correct answer is flammability.