A chemistry student conducted several different procedures. Which of the following procedures best demonstrates the law of conservation of mass?
using filter paper to separate 2 grams of solid powder from 10 grams of water
burning 2 kilograms of wood from a pine tree leaves 0.4 kilogram of ash and soot
evaporating sugar water leaves 5 grams of sugar and turns the water into water vapor
combining 2 grams of copper and 4 grams of sulfur to make 6 grams of copper sulfate
Answers: 3
Chemistry, 22.06.2019 16:00
Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules
Answers: 1
Chemistry, 23.06.2019 01:10
Volume is a measurement of how fast particles of a substance are moving
Answers: 3
Chemistry, 23.06.2019 01:30
At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.
Answers: 1
A chemistry student conducted several different procedures. Which of the following procedures best d...
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