Qualitative because it changed its colour not its quantity :)
That would be the compound Ba(NO3)2. The Barium ion has a charge of 2+ so there are 2 NO3- ions in the formula to produce a neutral compound.
(J) unit joule is the standard unit of heat (energy)
Divide each wight by the relative atomic mass
C = 216 / 12 = 18
H = 36 / 1 = 36
O = 288/16 = 18
Ratio of C:h:O = 1:2:1
Empirical formula is CH2O Could be formaldehyde HCHO.
Answer:
alright
Explanation:
Hess law is the enthalpy change for a reaction that is carried out in a series of steps is equal to the sum of the enthalpy changes for the individual steps. Consistent with the law of conservation of energy. Starting and final conditions must be the same.
