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.
C + 1/2O2 => CO
Monoxide is forming if there is no enough oxigen to combine with
The correct option is D.
Nowadays, scientists classified substances into four states of matter, which are: solid, liquid, gases and plasma. Plasma are hot ionized gas that is made up of equal number of positively and negatively charged ions. The ions in the plasma have very high kinetic energy which allow them to move around at high speed. Plasma is typically produce by heating gases to very high temperature.
HNO3 molar mass = 1 + 14 +3*16 = 63 g/mol
# of moles = mass / molar mass - 25.0 g / 63 g = 0.3968 moles
# of atoms = # of moles * Avogadro number = 0.3968 mol * 6.022 *10^23 atoms/mol = 2.39 * 10^23 atoms
