Answer:
optical (optic is the word used for referring to the eye ie optic nerve)
Explanation:
<span>Haemoglobin is a pure substance because it contains only one type of atom. </span>
You can view more details on each measurement unit: molecular weight of Aluminium or grams The molecular formula for Aluminium is Al. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Aluminium, or 26.981538 grams.
