<span>No, they are just moving very slowly or vibrating in a closed space so that it makes the item solid. Hope I helped. :)</span>
Hello!
CH3(CH2)4CCH
or <span> C7H12
</span>

<span>hydrocarbon: </span>
1-heptyne
Answer:
The mass of 3.5 moles of Ca is 140 g to two significant figures
Answer:
A physical property is a characteristic of matter that is not associated with a change in its chemical composition.Examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed.
Answer:

Explanation:
The given reaction has been occurred when the copper being more reactive than that of the silver. Which will subsequently displace the silver cations present in it, (by reducing it to the elemental metal). Copper being itself will get oxidized to the copper (II) cation forming
and dissolve in the solution. So, the final product formed with the silver metal will start precipitation out and giving the copper (II) nitrate as resultant in the solution.