Red Seal Cosmetology Practice Exam

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What does 'H' stand for in COHNS?

Hydrogen
Helium
Hafnium
Hassium

The correct answer is: Hydrogen

'H' stands for Hydrogen in COHNS. Hydrogen is typically the first element listed in chemical formulas and is the lightest and most abundant element in the universe. A Hydrogen is the correct answer as it is the only element that starts with the letter 'H' that is included in the acronym COHNS. B: Helium is incorrect as it does not start with the letter 'H' like COHNS suggests. C: Hafnium is incorrect as it starts with an 'H' but is not the first element listed in the chemical formula. D: Hassium is incorrect as it does start with the letter 'H' but is not commonly used or included in the COHNS acronym.