Chemistry, 17.07.2019 16:30, dozsyerra

Water evaporating from a puddle is an example of a physical property. physical change. chemical property. chemical change.

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Chemistry, 22.06.2019 02:30, drivinghydra

What is the relation between concentration of reactants and the rate of chemical reaction?

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Chemistry, 22.06.2019 12:00, daytonalive83481

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

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Chemistry, 22.06.2019 16:50, TrueKing184

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

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Chemistry, 22.06.2019 20:40, larkinc2946

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.

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Water evaporating from a puddle is an example of a physical property. physical change. chemical p...