Chemistry, Chapter 3 quiz Name - Teacherpage

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B. 69.723gC. 69.723 g/molD. 69.72 amu14. What is the average atomic mass: of 69 Ga at 60% and 71 Ga at 40%A. 69.8 amuB. 1175.76 amuC. 207.22 amuD. None of the above15. Calculate the number of atoms is 2.5 mol of ManganeseA. 1.51atoms MnB. 1.51 x 10 24 atoms MnC. 1.5 x 10 24 atoms MnD. 1.5 x 10 23 atoms Mn16. Calculate the mass in grams (g) of 1.20 x 10 25 atoms of heliumA. 20.0 g HeB. 79.7 g HeC. 797 g HeD. 19.9 g He17. How many moles are there in 0.255 g of sulfur?A. 7.95 x 10 -3 mol SB. 7.95 x 10 3 mol SC. 8.18 mol S
D. 4.23 x 10 -25 mol S18. What is the molar mass for Carbon?A. 12.01 g/molB. 12.01 amuC. 40.08 g/molD. all of the above19. From the following, which isotope has 56 protons and 82 neutronsA. Barium-138B. Boron-138C. Bromine-56D. Bromine-822 0.What should be THE grade you get in this test?A.FB. DC. AD. both A and BFor the following (if there’s math involved) you must show all your work.21. How many grams are present in 5.21 x 10 12 atoms of Lithium (Li)?
Page 1 and 2: Chemistry, Chapter 3 quizName:_____
Page 3: A. 6.0 x 10 23 moles /atomsB. 6.022

Chemistry, Chapter 3 quiz Name - Teacherpage

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