Determine the quantity of heat required to heat 352 g of water
from 20.0°C to 93.7°C in an
electric kettle.

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

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

Who discovered a pattern to the elements in 1869?