Answer:
ability to rust
Explanation:
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Answer:
The correct option is: Br₂--------->2 Br(g)
Explanation:
Bond dissociation is a process in which energy is applied to break a chemical bond between the atoms of a molecule to give free atoms.
In the given reaction: Br₂-------->2 Br(g)
The covalent bond in Br₂ molecule dissociates to give two moles of bromine atoms. Therefore, it is a bond dissociation reaction.
Start by writing the atoms balance:

Now, determine the change of oxidation states:

has oxidation state 0, so each N has to gain 3 electrons to become

.
That, means that you need 6 electrons to balance the charges, resulting in:
And the answer is 6 mole of electrons.
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Answer: The empirical formula is 
Explanation:
If percentage are given then we are taking total mass is 100 grams.
So, the mass of each element is equal to the percentage given:
Mass of Na= 34.5 g
Mass of B= 16.4 g
Mass of O = 48.6 g
Step 1 : convert given masses into moles.
Moles of Na =
Moles of B =
Moles of O =
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For Na = 
For B = 
For O =
The ratio of Na: B: O= 1: 1: 2
Hence the empirical formula is 