How is ice-cream melting a physical change?

Which of the following has the shortest half life? Carbon-14 Uranium-235 Uranium-238 Carbon-12

Calculate the volume of naoh solution that contains 0.72 g of a 8.0 % (m/v) naoh solution.

Find the percent composition of each element in KMnO4

Consider the compounds tert-butylcyclohexane and 4-tert-butylcyclohexanol. Using silica gel plates, which of the two compounds will have the higher Rf value when ethyl acetate is the developing solvent?

Four organic compounds: 2-butanone, n-pentane, propanoic acid, and n-butanol, present as a mixture, are separated by column chromatography using silica gel with benzene as the eluent.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda