Answer:
The question is incomplete because the options are not given, here are the options gotten from another websites.
a. It is correct because each ion is a pure substance, so sodium phosphate is made up of two pure substances.
b. It is correct because the composition of sodium phosphate changes depending on the sample.
c. It is incorrect because sodium phosphate is a compound that has a single composition.
d. It is incorrect because the two types of ions in sodium phosphate cannot be seen.
The correct option is C.
It is incorrect because sodium phosphate is a compound that has a single composition
Step-by-step explanation:
It is incorrect because sodium phosphate is a compound that has a single composition because a Compound is substance that contain two or elements which combine together by chemical bonds or the atoms of the element are joined together by chemical bonds. From our question, sodium phosphate is a compound because it is composed of two elements which are sodium and phosphate and these elements atoms chemically combine together.