Naturally occurring zirconium exists are five isotopes. axe with a mass of 89.905 u(51.45%); zr with a mass of 90.906 u (11.22%); zr with a mass of 91.905 u (17.15%); zr with a mass of 93.906 u (17.38%) and zr with a mass of 95.908 u (2.80%). calculate the average mass of zirconium.

Identify two types of chemical bonding in the source of dietary potassium

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)]

Which of the following statements are incorrect?