2. Methane can be reacted with steam to produce carbon monoxide and hydrogen. The equation for this process is given below.
CH(g) + H2O(g) → CO(g) + 3H2(g)
The table below shows the enthalpy changes of formation for methane, steam
and carbon monoxide.
compound
Hf / kJ mol-1
CH4
-75
H20
-242
СО
-110

Use the Hf values in the table to calculate the enthalpy change for the reaction shown in the equation shown above.

2b2t

explanation:

2b2t

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

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