Question

chemistry

Answer 1

is it 189.3 @vocaloid

Answer 2

almost

Zn = 65.38 g/mol

N = 14.007 g/mol

O = 15.999 g/mol

65.38 + 2(14.007) + 6(15.999) = 189.388 so you need to round up to 189.4

Answer 3

do I round up because theres a 8 behind it? what if there was a 4

Answer 4

if it was 189.34 you would round down to 189.3

5 and above is the cutoff for rounding up
4 and below, round down