An object with a mass of 0.255 kg and density of 2.89 g/cm^3 measures 34 mm in length and 46 mm in width. What is the height of the object? 1) 5.6 cm
2) 5.6•10^-2 cm
3) 7.2 •10^-4 cm

5.64 I think, I'm sorry if I'm wrong

your answers are a,b,,e and f

i hope this

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.