Diego found a mysterious liquid in the back of his garage. He measured out 22.4 mL of it and found that it had a mass of 18.45 grams. What is the density of this liquid? If water has a densit of 1 g/cm3, would the liquid sink or float?

it’s a fill in the blank question just so yk it’s not on solid answer

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)

Can someone me with questions 15 to 17 plz.

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?