How do I find the number of moles and molar mass of Gas A and Gas B with the information provided?

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

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