Question

gizmo warm - up
what do rice, potatoes, and sugar have in common? they are all foods rich in carbohydrates. carbohydrates are an important energy source for your body. the basic building block of most carbohydrate compounds is the molecule glucose. using the dehydration synthesis gizmo, you will learn about the structure of a glucose molecule and how glucose molecules can be joined together to make larger carbohydrate molecules.
to begin, select the create glucose tab.

1. look at the chemical formula for glucose. how many carbon (c), hydrogen (h), and oxygen (o) atoms are found in a molecule of glucose? c: h: o:
2. turn on show chemical structure. each black sphere represents a carbon, hydrogen, or oxygen atom. the lines connecting the spheres represent chemical bonds.

a. how many black spheres are in the diagram?
b. how does this relate to the number of carbon, hydrogen, and oxygen atoms in the chemical formula for glucose?

Explanation:

Step1: Recall glucose formula

The chemical formula of glucose is $C_6H_{12}O_6$.

Step2: Count atoms

From the formula, the number of carbon atoms $C = 6$, hydrogen atoms $H=12$, and oxygen atoms $O = 6$.

Step3: Analyze black - spheres

Since each black sphere represents an atom and the formula has 6 + 12+6=24 atoms, the number of black spheres in the diagram representing the chemical structure should be 24. And the number of black spheres is equal to the total number of carbon, hydrogen and oxygen atoms in the chemical formula of glucose.

Answer:

1. C: 6, H: 12, O: 6
2. A. 24

B. The number of black spheres is equal to the total number of carbon, hydrogen and oxygen atoms in the chemical formula of glucose.