Pure substance can be __ and _

Anh measured the temperature of a pond near his house. Before he left for school, the water in the pond was 18 degrees celsius.

Hitman42 [59]

As the temperature increases, B) the molecules started moving faster.

Explanation:

The temperature of a substance is a measure of the average kinetic energy of the particles in a substance. In particular, it can be found that the temperature is directly proportional to the average kinetic energy of the particles:

$T\propto KE$

The kinetic energy of a particle is given by

$KE=\frac{1}{2}mv^2$

where

m is the mass of the particle

v is its speed

This means that the higher the temperature of a substance, the greater the speed of the particles in the substance.

Therefore, if we apply this concept to this problem, we infer that as the temperature of the water in the pond gets higher, the speed of the molecules inside the water increases, which means that the molecules are moving faster.

Therefore, the correct answer is

B) the molecules started moving faster.

Learn more about temperature:

brainly.com/question/1603430

brainly.com/question/4370740

#LearnwithBrainly

3 0

4 years ago

Consider the diagram. Which postulate of the kinetic-molecular theory best describes the event in the diagram?

MatroZZZ [7]

Answer : Option B) All collisions between particles are perfectly elastic.

Explanation : Gases consits of molecules which are compressible because the gas particles which have a small volume compared to the container.

The collisions are perfectly elastic because when gases are left alone in a container they don't seem to lose energy and do not spontaneously get converted into a liquid, also energy is not lost during collisions.

In the diagram given above one can interpret that the gaseous molecules are in random motion inside the container and when they collide with other molecule of gas they do not lose energy. Therefore, this shows perfectly elastic collisions.

3 0

4 years ago

Read 2 more answers

What’s the equation for

rosijanka [135]

Here you are!! Welcome!!

4 0

4 years ago

URGENT PLEASE HELP

Mariulka [41]

The trend will be such that the time taken for the cross to disappear will be increasing.

<h3>Rate of reactions</h3>

The rate of reactions is affected by the concentration of reactants. The more concentrated the reactants are, the more the rate of the reaction, and vice versa. This is based on the condition that all other factors are kept constant.

In the illustrated reaction, the volume of sodium thiosulfate decreases downward while the volume of water increases. This means that the sodium thiosulfate gets more diluted as we move downward.

Thus, the reaction rate will keep decreasing. In other words, more time would be needed for the cross to disappear as the concentration of sodium thiosulfate decreases.

More on concentration and rate of reactions can be found here: brainly.com/question/13764840

#SPJ1

5 0

2 years ago

In this activity, you will be observing a reaction where copper and silver nitrate react to form copper (II) nitrate and silver.

aalyn [17]

Answer:

Copper(II) nitrate and silver

Explanation:

2AgNO₃(aq ) + Cu (s) --> Cu(NO₃)₂(aq ) + 2Ag(s)

This can be called a redox reaction because silver nitrate is reduced and copper is oxidized. This can also be called a single replacement reaction because copper replaces silver in the substance silver nitrate.

4 0

3 years ago

Pure substance can be __ and __

Pure substance can be and