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Chemistry, 22.06.2019 17:40
Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.
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Chemistry, 22.06.2019 21:00
The rate constant for the reaction below is 6.2 x 10β5 mol lβ1 s β1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?
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Chemistry, 23.06.2019 01:00
Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green
Answers: 1
In compounds, elements are combined in fixed proportions. What does this mean? Use an example to ill...
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