Rounding off the number 399 870 to three significant figures is, 4.00 x 104
3,01 x 10
3,99 x 104
4,00 x 10

Evaluate this exponential expression,8. (2 + 3)2 – 42

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

What woukd most likely be the transmittance at a 0.70 m solution of solute a? a) 7.6%b) 1.1%c)4.0%d)4.6%