Use data from the tables A.5 – 7 in the appendix to answer the following questions. a. A friend wants to sell you a catalyst that allows benzene( g ) to be formed by passing H2(g) over carbon (graphite) at 25°C and 1 bar. Should you buy? Why? b. Is the reaction 2NO(g) + O2(g) S 2NO2(g) spontaneous at 25°C and 1 bar? c. Is the reaction to form solid alanine, CH3CHNH2COOH, and liquid H2O from CH4 (g), NH3 (g), and O2(g) spontaneous at 25°C and 1 bar?

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.  

i think its 100.

hope this !