What is the change in enthalpy when 18 g of water vapor condenses at 100 C?
( Δ Hv = 41 kJ/mol)

A. 18
B. 41
C. -41
D.-410

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments