A solution is prepared by mixing 25 mL pentane (C3H12, d =
0.63 g/cm) with 45 mL hexane (C6H14, d = 0.66 g/cmº).
Assuming that the volumes add on mixing, calculate the mass
percent, mole fraction, molality, and molarity of the pentane.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles