Chemistry, 31.07.2019 17:30 Giovanni0312

Which criteria determine whether a heterogeneous mixture is a colloid or a suspension?

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This question has the next set of answer choices:

a) whether its composition is uniform and transparent

b) whether the particles do not settle for an extended period of time

c) whether the ratio of components is fixed

d) whether it can be separated into simpler substances through physical separation techniques

The answer is the option b: whether the particles do not settle for an extended period of time.

Justification:

Both colloides and suspensions are heterogeneous mixtures whose particles are larger than the particles of a solution, but the particles of a colloind are smaller than the partilces of a suspension. So, the suspensions settle faster than colloids.

Being both heterogeneous mixtures their ratios of the components are not fixed and they can be separated into simpler substances through physical separation techniques.

The criteria of uniformity and transparency are not used becasue they do not differentiate well suspensions and colloids.

Answer from: Quest

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

Answer from: Quest

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

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