I don't know but look on the internet or use a calculator
Answer:
electrons/electron density
Explanation:
Answer:
Last one
Explanation:
There always has to be evidence to back that up.
Explanation:
The given data is as follows.
Density of vinegar = 1.0 g/ml
Specific heat capacity = 4.25 
=
, and
= 
Relation between enthalpy and specific heat is as follows.

Hence, putting the values into the above formula as follows.

=
(as density =
)
= - 315 J
Thus, we can conclude that the enthalpy of reaction is -315 J.
As the value is negative so, it means that heat is releasing. Hence, the reaction is exothermic in nature.
Answer:
HCL
Explanation:
Covalent bond are formed between non metals so look for the pair of non metal atoms and this would be hydrogen chloride (HCL)