18. What is the definition of a molecule? A. A substance that has two or more elements combined
B. The smallest unit of matter
C. The foundation of all forms of matter
D. Two or more atoms combined

Substance a is a nonpolar liquid and has only dispersion forces among its constituent particles. substance b is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles. when substance a and b are combined, they spontaneously mix.

Asap a 50.0 ml soap bubble is blown in a 27.0°c room. it drifts out an open window and lands in a snow bank at -3.0°c. what is its new volume?

The total amount of fresh water on earth is estimated to be 3.73 x 10^8 km^3. what is this volume in cubic meters? in cubic feet?