How many different types of hydrogens are present in the following molecule? 
Definitions:
NaBr
Sodium bromide, a salt with various uses including in medicines, as a sedative, and in photographic processing.
React
To undergo a chemical change or transformation in response to another substance or condition.
Sodium Chloride
The chemical name for table salt, a compound with the formula NaCl, widely used as a condiment and preservative.
Sodium
A soft, silver-white, highly reactive metal belonging to the alkali metal series in the periodic table, denoted by the symbol Na.
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