Which option best describes Hess's Law? The heat of reaction is the sum of reactant heat minus the sum of product heat

The heat of reaction is the sum of product heat minus the sum of reactant heat

The heat of reaction is the sum of product heat plus the sum of reactant heat

The heat of reaction is the sum of reactant heat plus the sum of product heat

In 2002, the rare earth elements mine in mountain pass, california was closed because

Iwould appreciate if someone could me.

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)