According to the following reaction, how many grams of hydrogen peroxide (
h
2
o
2
) are necessary to form 0.182 moles oxygen gas?
hydrogen peroxide (
h
2
o
2
) (aq)
→
water (l) + oxygen (g)

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

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?