Polly did an experiment with marbles in a glass bowl to show the movement of particles in solids, liquids, and gases. The experimental set-up is shown below: A glass bowl is shown with four marbles inside it.

What should Polly do to represent the particles of a solid? (5 points)

Pack the bowl with marbles and then tap it gently.

Add two more marbles to the bowl and then shake it slowly.

Take out two marbles from the bowl and then shake it vigorously.

Add water to the bowl so that the marbles start sliding past one another.

b is the correct answer

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consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

24

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explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them