Chemistry, 25.10.2019 04:43 pinkapple2396
Asample of copper powder is heated in an evaporating dish using a bunsen burner. if the mass of the powder in the evaporating dish increases after heating, this indicates that a. the copper must have combined with another substance. b. the copper must have lost matter. c. hot copper is more dense than cold copper. d. hot copper weighs more than cold copper.
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Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?
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21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8
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Chemistry, 22.06.2019 09:00
Particles vibrate in a rigid structure and do not move relative to their neighbors.
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Asample of copper powder is heated in an evaporating dish using a bunsen burner. if the mass of the...
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