A given volume of gas at a temperature of 100 K has a pressure of 225 kPa. At a higher temperature, the same
volume of
gas has a pressure of 450 kPa. At what
temperature does the gas have this higher pressure?

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

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?