How many atoms are in 3.75 moles of Carbon?

One mole of Carbon contains 6.022x10^23 atoms.

3.75 moles of carbon contains ( 6.022x10^23 ) x ( 3.75 ) = 2.26x10^24 Atoms.

One mole of every element or compound is equal to 6.022x10^23 number of Atoms or Molecules and this number of atoms is known as Avogadro's Number.

what are the óptions. pléase list them

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"