1. you have three molecules of glucose (3c6h12o6). how many carbon atoms do you have? . a. 3. b. 6. c. 18. d. 36. 2. which of the following is a homogenous mixture of two or more pure substances? . a. oxygen. b. water. c. air. d. alcohol.

1. C. 18 atoms of carbon

2. C. Air

Explanation:

1. The formula of one molecule of glucose is

In this formula we have:

Carbon: 6 atoms

Hydrogen: 12 atoms

Oxygen: 6 atoms

if we have three glucose molecules, we have to multiply the formula () by three

In this formula we have:

Carbon: 18 atoms

Hydrogen: 36 atoms

Oxygen: 18 atoms

2. A homogeneous mixture is the combination of 2 or more unidentifiable elements or substances within the solution.

Homogeneous mixtures are characterized by being uniform, this means that the elements that compose it are not distinguishable.

A. Oxygen is molecule

B. Water is molecule compose by 2 elements

C. Air is a mixture of several gases.

D. Alcohol is compound of carbon, hydrogen and oxygen.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).