Which of the following is a physical model of the sun? a. an equation that describes the sun’s motion b. a chart that lists the temperatures of different parts of the sun c. a computer program that shows how the sun changes over time d. a paragraph that describes the sun’s structure e. a small yellow ball that represents the sun

E. a small yellow ball that represents the Sun

Explanation:

The question asks for a physical model/representation of the Sun.

The answer has to be something physical, something concrete, something you can touch.  This means it has to be in 3-dimensions, not just an image.

The other answer choices are providing information or abstract representations.  Abstract models are ones you cannot physically touch, but can picture in your mind or view as an image.

- D. 1.8 moles of Fe and .

Solution:- The balanced equation is:

let's first figure out the limiting reactant using the given moles and mol ratio:

= 5.4 mol CO

From calculations, 5.4 moles of CO are required to react completely with 1.8 moles of Iron(III)oxide but only 2.7 moles of CO are available. It means CO is limiting reactant.

Products moles depends on limiting reactant. Let's calculate the moles of each reactant formed for given 2.7 moles of CO.

= 1.8 mol Fe

=

So, the correct choice is D.  1.8 moles of Fe and are formed.