Which has a greater volume, 10 grams of water or 10 grams of acetone?

Density is defined as the ratio of mass to the volume.

Density =          (1)

Mass of water = 10 grams

Mass of acetone  = 10 grams

Density of water  = 1

Density of acetone  = 0.7857

Put the value of density of water and its mass in equation (1)

1 =  

Volume of water =  10

Put the value of density of acetone and its mass in equation (1)

0.7857 =  

Volume of acetone = 12.72

Thus, volume of acetone is more than volume of water because the density of acetone is lower.

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.

im not exactly sure but i think its b!