Which property of isotopes makes them suitable for determining the dates of ancient artifacts?

What is the molar mass of a gas that has density of 2.054 g/l

In science class richard learns that a substance has a boiling point of 230 fahrenheit his teacher ask him to convert this temperature to degrees celsius what is the boiling point of his substance in degrees celsius

How many moles of co2 are produced during the complete combustion of 3.6 moles of c2h6