Question

9.

A student performed an investigation at sea level. First she placed 400 mL of water in four different containers. Then she placed the containers on hot plates with four different temperature settings, as shown in the table.


Which characteristic of water remained the same in each container?



A. the shape of the water


B. the rate of evaporation


C. the boiling point of water


D. the amount of steam released per minute

Answer 1

C. the boiling point of water

Step-by-step explanation:

B is correct because boiling point only usually differs among the same substance when pressure changes. So say you take one solution onto a mountain top and another at sea level, the boiling point will not be the same, but here we assume they are in the same place so it won't.

A cannot be because the containers are all different shapes (and we aren't talking about like molecular shape of water from what I assume, we mean macroscopically, so that can't be).

B cannot be because we have 4 different temperatures.

D cannot be because we have 4 different temperatures, and therefore different amounts of steam will be released per minute as not all the waters have reached boiling.