***BRAINLIEST ASNWERRR***
How many grams are in 34.2 moles of Lithium (Li)?

Mass of Li = 237.38 g

The mole itself is the number of particles contained in a substance amounting to 6.02.10²³  

Moles of Li = 34.2

Molar mass(MW) of Li = 6.941 g/mol

then mass of Lithium (Li) :

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.