The vapor pressure of a substance at 30 C is 70 kPa and its enthalpy of vaporization is 20 kJ / mol Estimate the temperature (in K ) at which its vapor pressure is 90 kPa​

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

Which activity is an innate behavior