Chemistry, 03.02.2021 21:00 tishfaco5000
Which of the following is ONE of the signs of a chemical change
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One mole of zinc has a mass of 65.4 grams. approximately how many atoms of zinc are present in one mole of zinc? 32 × 1023 atoms 6 × 1023 atoms 66 atoms 65 atoms
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The first element on the periodic table of elements is carbon. a. true b. false
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Identify and describe the three ways that mutations affect organisms.
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8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm
Answers: 1
Which of the following is ONE of the signs of a chemical change...
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