An unknown compound has a percent composition of 52.10% potassium, 15.8% carbon, and 32.1% oxygen. the molar mass of the
compound is 150.22 g/mol. what is the empirical formula and the molecular formula of this compound?
element
hydrogen
carbon
nitrogen
oxygen
potassium
molar mass
(g/mol)
1.0079
12.01
14.01
16.00
39.1

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)]