Which of the following is a heterogeneous mixture?

A. water in a swimming pool
B. sugar water
C. a jar of mixed nuts
D. stainless steel

I think it's B.

The answer would actually be C: a jar of mixed nuts. Choice B refers to a homogenous mixture because the sugar is evenly spread out and will dissolve in water. Choice C is the answer because the nuts are different and not the same so they won't be evenly spread out.

To determine which of the given options is a heterogeneous mixture, we need a basic understanding of what a heterogeneous mixture is.

A heterogeneous mixture is a mixture in which the different components can be seen and are not evenly distributed. This means that we can visually identify the different substances within the mixture.

Now, let's examine the options:
A. Water in a swimming pool: Even though the water in the pool may contain various substances like chlorine or minerals, it appears uniform and does not have any visible components. Thus, it is considered a homogeneous mixture.

B. Sugar water: Sugar dissolves completely in water, resulting in a clear and uniform solution. Therefore, it is a homogeneous mixture.

C. A jar of mixed nuts: In a jar of mixed nuts, we can visually identify different components such as nuts, seeds, and possibly other additives. Since the mixture contains distinct, visible components, it is a heterogeneous mixture.

D. Stainless steel: Stainless steel is an alloy made from a combination of metals, mainly iron, chromium, and nickel. It appears uniform and does not have visibly separate components, making it a homogeneous mixture.

Based on this analysis, the correct answer is C. A jar of mixed nuts is a heterogeneous mixture.