I need help on this one too I think it might be (b)
Answer:
acids or bases can be tested
by chemical indicators
Of what?
Attach a link or pic
Convert the mass to moles .
85.1 g ÷ 20.18 g/mol = 4.21704658
convert the moles to molecules
4.2170 mol × 6.022^23 molecules/mol = 2.539^24
