Which rule concerning oxidation numbers is NOT true? A. The product of all oxidation numbers in a molecule must equal the charge of that molecule.
B. A substance with only one type of atom in it has an oxidation number equal to the charge of the substance divided by the number of atoms present.
C. Group 1A metals always have an oxidation number of +1 in molecules that have more than one type of atom.
D. Group 2A metals always have an oxidation number of +2 in molecules that have more than one type of atom.
E. When paired with only one metal atom, Hydrogen has an oxidation number of –1.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.