Which statement describes both homogeneous mixtures and heterogeneous mixtures?

a.
their components can be distinguished visually.
b.
their components are combined in a fixed ratio.
c.
their components can be separated by physical processes.
d.
they always contain a liquid component.
e.
they are considered to be pure substances.

#2 image provided: question: select the atomic models that belong to the same element.

what is the si unit used to measure the temperature of a substance?

a.
degree celsius
b.
degree fahrenheit
c.
gram
d.
kelvin
e.
mole

Answer :

(1) The correct option is, Their components can be separated by physical processes.

(2) In the given image, image 1, 2 and 4 belong to the same element.

(3) The correct option is, kelvin

Explanation :

For 1 :

Heterogeneous mixtures : It is a mixture that appears non-uniformly throughout the solution and the particle size or shapes are also different.

Homogeneous mixtures : It is a mixture that appears uniformly throughout the solution and the particle size or shapes are not different.

The similarity between the homogeneous and heterogeneous mixture is that their components can be separated by physical processes. As the mixture of salt and water is homogeneous mixture which can be separated by the evaporation and the mixture of sand and water is heterogeneous mixture which can be separated by the filtration. Evaporation and filtration is a physical processes.

For 2 :

The element having the same number of protons are called as isotopes of the same element.

From the image given, three of the structures justify the above statement.

The three atomic models are model 1, model 2 and model 4.

For 3 :

S.I : It is defined as a scientific method to express the magnitude of the several basics units.

There are seven basic units in the system from which the other units are derived.  The seven base unit are, meter for length, kilogram for mass, second for time, ampere for current, kelvin for temperature, mole for amount of substance and candela for intensity.

As we know that the temperature can be measured in, degree Celsius, degree Fahrenheit and kelvin.

Thus, the SI unit of temperature is, kelvin

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