Which of the following statements are true? I.Models are always wrong unless they are proved by a theory.
II) Elements,such as lead,are made of tiny particles that mostly consist of open space.
III) The air you breathe is an example of a heterogeneous mixture.
IV) Because NH₃ always contains the same relative numbers of atoms,it will always contain 4.6 g of nitrogen for every 1.0 g of hydrogen.

Question

Quizplus · Accepted Answer

Statement II is true according to the atomic model. Statement IV is true according to the law of definite proportions. Statement I is not necessarily true as models can be validated through experimentation and observation without the need for a theory. Statement III is false as air is a homogeneous mixture.

Which of the Following Statements Are True? I