What is the wavelength of a photon with a frequency of 7.81 x 1014 Hz?
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Chemistry, 21.06.2019 13:30
Forests and meadows are often cut down to make way for farms or large number of new homes. what are some of the elements of ecosystems that are lost when plants in these areas are removed?
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If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?
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Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel
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Chemistry, 22.06.2019 19:30
To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %
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