Answer:
A) B has more electron shells then A
Explanation:
Element A is flourine
Element B is chlorine
Chlorine has three electron shells and flourine only has 2 electron shells (on Bohr model)
Chlorine's outer shell has 7 electrons and so does flourines outer shell(on bohr model)
Sense Answer A is correct and Answer B is wrong, common snese will tell you that D is wrong sense B is wrong, and sense D is wrong that means only one is right and sense A is correct it makes C wrong
True because radioactive contamination results in contact with radioactive substances
Answer:
-145.2kJ
Explanation:
Enthalpy is an extensive property as its value depends on the amount of substance present in the system.
If the enthalpy for one mole of methanol = -726 kJ/mol;
The Enthalpy for 0.2 mol is given as;
Enthalpy = 0.200 * 726
Enthalpy = -145.2kJ
It would take -145.2kJ for 0.200 mol of methanol to undego the combustion reaction.
Answer:O D to protect the environment from harmful chemicals
Explanation:
Answer:
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