Question

define the term \law of definite proportions.\ select one: a grouped counting term used to group 6.022 x 10^23 things together the reactant in the least amount that can be used in the reaction a chemical compound contains exactly the same proportion of elements by mass the mass in grams of one mole of atoms or molecules of that compound

Explanation:

The law of definite proportions states that a chemical compound always contains exactly the same proportion of elements by mass, regardless of the source or amount. Let's analyze the options:

• The first option describes Avogadro's number (grouping \(6.022\times10^{23}\) entities), not the law of definite proportions.
• The second option refers to the limiting reactant, which is about reaction stoichiometry, not the law.
• The third option matches the definition of the law of definite proportions, as it emphasizes the fixed proportion of elements by mass in a compound.
• The fourth option defines molar mass, not the law of definite proportions.

Answer:

the third option (the option with "a chemical compound contains exactly the same proportion of elements by mass")