October 2018 1 321 Report
6.Formalin merupakan larutan preservatif yang digunakan di laboratorium biologi. Larutan ini mengandung 40 cm3 formaldehida, CH2O, (densitasnya 0.82g/cm3) per 100cm3 air. Molalitas formalin adalah .... (Ar: C = 12, H = 1, O = 16).
a) 10
b) 8.0
c) 11
d) 12
e) 9.0
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