Answer: The question is incomplete,below is the complete question.
Which two statements are true for both compounds and mixtures?
A) Both mixtures and compounds must contain two or more kinds of atom.
B) Mixtures must always contain atleast one compound.
C) Both mixtures and compounds can have a variable composition.
D) More than one correct response.
E) No correct response.
The correct answer to the question is option A
BOTH MIXTURES AND COMPOUNDS MUST CONTAIN TWO OR MORE KINDS OF ATOM.
Explanation: A mixture contains two or more constituents(atoms, elements, compounds) which can easily be separated by physical methods while a compound is a substance which contains two or more elements(atoms) chemically combined together.
Mixtures may be homogeneous or heterogeneous while compounds are always homogeneous.
The constituents of a mixture are not chemically bound together and can therefore be easily seperated and recovered by physical means while component elements of a compound are chemically bound together and cannot be seperated by physical means.
The constituents of a mixture can be added together in any ratio by mass, hence mixtures cannot be represented by a chemical formula while the components of a compound are presented in fixed ratio by mass, hence a compound can always be represented by a chemical formula.
The properties of a mixture are the sum of those of it's individual constituents while the properties of a compound differ entirely from those of it's component elements.
Inspite if the comparison stated above,both mixtures and compounds must contain two or more kinds of atom.
