The following is a small portion of the periodic table. What do all of the elements in group 13 have in common?
GROUP 13
Ne
H He
1007400000
3
6
10
B С N O F
120107140002015954030129
15 16
15
Al Si P S C1 Ar
1532130.066
30
4
16
As Se Br Kr
Cu
Zn
Ga
Ge
Ag Cd
10112411
In Sn
114 115
Sb
54
Te Xe
1760131
Au Hg
1903
TI
Pb Bi Po
200000
At
Rn
They have the same number of proton
They are all the same color
They all share similar physical properties
They all share similar chemical properties

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

the correct answer is:

a. formation of precipitation