Ineed it is really difficult i’m not the greatest t chemistry me

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

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

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)