How many moles of
HX2O\ce{H2O}
H
X
2


O

will be produced from
42.0 g42.0 \text{ g}
42.0 g
42, point, 0, start text, space, g, end text
of
HX2OX2\ce{H2O2}
H
X
2


O
X
2

Explanation for basic character?

An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³

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?