Answer:
i had this same question and the answer is electron.
Explanation:
Answer:
precipitation...
Explanation:
the stuff that makes your hair frizz up when the weather is very humid . ( basically , it means very dry or humid out. )
Answer:
Tetrahedral. Tetra- signifies four, and -hedral relates to a face of a solid; “tetrahedral” literally means “having four faces. ” This shape is found when there are four bonds all on one central atom, with no lone electron pairs. In accordance with the VSEPR theory, the bond angles between the electron bonds are 109.5o ...
STP stands for standard temperature and pressure. Standard pressure is equivalent to 1 atm, and standard temperature is equivalent to 273.15 K. Therefore, your answer is A. the temperature is 273.15 kelvin.
Hope this helps!
<span>S(s)+O2(g)→SO2(g), ΔHâ = -296.8kJ
SO2(g)+12O2(g)→SO3(g) , ΔHâ = -98.9kJ
H2(g) + 1/2 O2 (g) --------> H2O(l)ΔHâf = -285.8kJ
SO3(g) + H2O(l) --------> H2SO4, ΔHâ = -227.8 kJ .
All above steps are involved in the formation of H2SO4, therefore delta Hf for H2SO4 is [ -296.8+ (-98.9)+ (-285.8) +(-227.8)] = - 909.3 kj/mol
The energy required to form 1 mol H2SO4 fom its elements is - 909.3 kj / mol</span>