Question

Which of the following properties is a chemical property?(1 point) Responses flammability flammability melting point melting point magnetism magnetism hardness hardness Skip to navigation page 7 of 7
GPT-4o mini
The property that is a chemical property among the options provided is **flammability**. Flammability refers to the ability of a substance to catch fire and burn, which involves a chemical change. The other properties listed (melting point, magnetism, and hardness) are physical properties.
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)
GPT-4o mini
The substance that is a compound among the options provided is **water (H₂O)**. Water is composed of two hydrogen atoms and one oxygen atom, chemically bonded together, making it a compound. Gold (Au), oxygen (O), and carbon (C) are all elements, not compounds.
Which of the following substances is an element?(1 point) Responses hydrogen hydrogen salt salt insulin insulin protein
GPT-4o mini
The substance that is an element among the options provided is **hydrogen**. Hydrogen is a pure chemical substance that cannot be broken down into simpler substances by chemical means, making it an element. Salt, insulin, and protein are all compounds made up of multiple elements.
Which of these properties is a chemical property?(1 point) Responses magnetism magnetism melting point melting point flammability flammability hardness
GPT-4o mini
The property that is a chemical property among the options provided is **flammability**. Flammability refers to the ability of a substance to ignite and burn in the presence of oxygen, indicating a chemical change. The other properties listed (magnetism, melting point, and hardness) are physical properties.
The chemical formula for methane is CH 4 . What is the fixed ratio of carbon (C) to hydrogen (H)?(1 point) Responses 1:1 1:5 4:5 1:4
GPT-4o mini
The fixed ratio of carbon (C) to hydrogen (H) in methane (CH₄) is **1:4**. This means that for every one carbon atom, there are four hydrogen atoms.