Chemistry, 18.12.2019 04:31, angelvega2003
The great french chemist antoine lavoisier discovered the law of conservation of mass in part by doing a famous experiment in 1775. in this experiment lavoisier found that mercury(ii) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas.
1. write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury(ii) oxide (hgo) into liquid mercury and gaseous dioxygen.
2. suppose 50.0ml of dioxygen gas are produced by this reaction, at a temperature of 90°c and pressure of exactly 1atm. calculate the mass of mercury(ii) oxide that must have reacted. be sure your answer has the correct number of significant digits.
Answers: 1
Chemistry, 22.06.2019 00:00, rileyallen4186pd5tgy
Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.
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Chemistry, 22.06.2019 00:40, petriajack8375
1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /
Answers: 3
Chemistry, 22.06.2019 10:00, zionlopez543
Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.
Answers: 1
The great french chemist antoine lavoisier discovered the law of conservation of mass in part by doi...
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