0
What else can I help you with?
Does a mineral always contain certain elements in definite proportions?
No, a mineral does not always contain certain elements in definite proportions. While minerals have a specific chemical composition, the proportions of elements can vary within certain limits and still be considered the same mineral.
Is it true that a mineral always contains certain elements in definite proportions?
Yes, minerals have a specific chemical composition, meaning they contain certain elements in definite proportions. This is a characteristic feature of minerals that distinguishes them from other natural substances.
What theory states that a given compound will always contain exactly the same proportion of elements by weight?
Law of definite proportion or law of definite composition.
The scientific statement that says that compounds always have exactly the same composition by mass is?
The law of definite proportions states that compounds always contain the same elements in the same proportion by mass. This means that the ratio of elements in a compound is consistent and does not change.
What are the characteristics of a subtances and mixtures?
The components of a mixture are not chemically combined and do not have a definite composition. A pure substance is either an element or a compound (in which case it is composed of elements that are chemically combined) and has a definite composition.
What is true about the composition of all of the elements in the table?
All atoms of chemical elements contain protons, neutrons and electrons.
Does an elements composition vary?
It can if isotopes are present. They can contain different numbers of neutrons in the nucleus.
Do compounds always contain the same elements in the ratio?
No, compounds do not always contain the same elements in the same ratio. Compounds are formed by the combination of two or more elements in fixed proportions by mass. The ratio of elements in a compound is determined by the chemical formula of the compound.
Examples of the law of definite composition?
The law of definite composition states that chemical compounds always contain the same elements in the same proportions by mass. For example, water always consists of two hydrogen atoms and one oxygen atom in a 2:1 ratio by mass. Additionally, carbon dioxide always contains one carbon atom and two oxygen atoms in a 1:2 ratio by mass.
Which is not a property of a pure substance uniform composition varying composition fixed composition?
The property that is not characteristic of a pure substance is "varying composition." A pure substance has a fixed composition, meaning it has a consistent and definite chemical makeup throughout. In contrast, substances with varying composition are mixtures, which can contain different amounts and types of components.
Who developed the law of definite composition?
The law of definite composition was developed by French chemist Joseph Proust in the late 18th century. He formulated this law based on his experiments with chemical compounds, which stated that a given compound always contains the same elements in fixed proportions by mass.
Does it contain iron or zinc?
To determine if a substance contains iron or zinc, you would need to analyze its composition. Many materials, such as certain ores, alloys, and dietary supplements, can contain these elements. If you have a specific substance in mind, please provide more details for a more precise answer.
