What is the physical state of substance in a chemical reaction? What are the symbols of physical state?

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.