An “instant cold pack” contains water and an inner pouch with 46.9 g of KNO,. When the inner pouch is
broken and all of the KNO, is completely dissolved in water, the dissolving process absorbs 16.2 kJ of energy
(which “feels cold”). Calculate molar heat of solution (AH ) for this process in kJ/mol of KNO,.
" include correct sig figs, units, AND correct + or - sign

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

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

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?