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At room temperature a mystery substance is observed to take the shape of its container and can expand or be compressed to change its volume this mystery substance is most likely a:

A) liquid

B) solid

C) crystal

D) gas

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .