Calculate the heat required to change 41.0 g of liquid water at 14.7oC to steam at 100 oC and 1 atm. The specific heat of water is 4.184 J / (g oC) and water’s enthalpy of vaporization is 2260 J/mol.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

just did the assignment and the answer was #1 +2 n

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8