A sample of carbon dioxide gas collected at a pressure of 0.611 atm and a temperature of 300. K is found to occupy a volume of 868 mL. How many Moles of CO2 gas are in the sample? ___ mol

Which statement justifies that phosphine (ph3) is a polar molecule?

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)

How many neutrons does an element have if its atomic number is 50 and its mass number is 166