Chemistry, 11.03.2021 01:00, michaelsmith710
Students held a six-mole strip of copper strip over a flame until a
combustion began. Students were provided the balanced chemical
reaction for the combustion of copper and asked to describe the limiting
reactant.
2Cu + O2 + 2Cuo
Student Description of Limiting Reactant
Student 1 The limiting reactant is copper because all of the oxygen
combusted and the room still contained oxygen.
Student 2 The limiting reactant is oxygen because the oxygen will be
used up before the copper.
Student 3 The limiting reactant is copper because twice as much oxygen
is needed compared to oxygen.
Student 4 The limiting reactant cannot be determined because the
number of moles of oxygen was not known.
Which student correctly describes the limiting reactant?
Answers: 3
Chemistry, 22.06.2019 02:30, caeyanij
When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.
Answers: 3
Chemistry, 22.06.2019 05:20, anggar20
Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.
Answers: 1
Chemistry, 22.06.2019 06:30, backup5485
Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line
Answers: 1
Students held a six-mole strip of copper strip over a flame until a
combustion began. Students were...
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