What is the concentration of K+ ion in solution, in mmol/L? Mass K2Cr2O7 = 2.4 g
Mass water = 310 g
Amount K2Cr2O7 = 8.2 × 10-3 mol
Molality = 0.026 mol/kg
Mole fraction K2Cr2O7 = 4.7 × 10-4
Concentration of K2Cr2O7 = 26 mmol/L

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)