4. An unknown substance has a volume of 3.0 cm3 and a mass of 36 g. Based on the information provided in the table below, what is most likely the identity of this substance? Show your work Substanc Density e A 108 g/cm3 B 08 g/cm3 С 39 g/cm3 D 12 g/cm3 Page 1 / 3​

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)

As you move from right to left on the periodic table the atomic radius fill in the blank

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?