Please help will give brainliest What is the mole fraction of NaOH in
an aqueous solution that contains
15.0% NaOH (weight/weight %)?
Molar Mass
NaOH: 39.998 g/mol
H20: 18.016 g/mol

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

What is the number of moles in 15.0 g ash3?

An unsaturated hydrocarbon is a hydrogen-carbon compound with a. a network solid structure b. single bonds c. single bonds in a branched-chain structure d. double or triple bonds