Answer:
B is correct answer because The enthalpy is negative so this means the reaction produces heat and the reaction is exothermic
It is located in the inner rim of the Orion arm!
Answer:
21
Explanation:
Formula;
Mass number = number of protons + number of neutrons
= 9 + 12
= 21
9.Pubchem
10.Oxygen
11. Selenium fluoride
12. Disilicon Hexabromide
13. sulfur tetrachloride
14.Methane
15.diboron silicide
16. Nitrogen trifluoride
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