a concentrated potassium hydrocide solution is 45.0% KOH by mass and has a density of 1.44 g/mL at 25 C. The remainder of material is solvent. what is the molality of KOH in the solution

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]