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Chemistry, 22.06.2019 13:30
1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6
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Chemistry, 22.06.2019 14:30
Is a pencil falling to the floor anon contact force, a force, or a contact force
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Chemistry, 23.06.2019 04:00
What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?
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