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6) 7) 8) 9) 10) 11) Perform the calculation, and report the answer to the correct number of significant figures. (T) 0.368 ) (rootet07) _, 25.261.50 (a) 1.5x 10% (b) 1.55 x 104 (c) 1.547 x 10 (d) 1.5473 x 104 Which of the following samples has the greatest number of atoms? (OT) a. 0.1 moles of CO, b. 0.1 moles of O, c. 0.1 moles of CH, d. All three have the same number of atoms Refer to a periodic table. Which pair of elements do you expect to be most similar in their chemical properties? (T) (a) Ca and Cu (b) O and Sn (c) Nand P (d) Rb and Sr How many protons, neutrons, and electrons are in 194Ag*? (T) (a) protons = 60, neutrons = 47, electrons = 47 (b) protons = 47, neutrons = 107, electrons = 48 (c) protons = 47, neutrons = 60, electrons = 46 (d) protons = 47, neutrons = 107, electrons = 46 What is the atomic weight of an element that consists of two naturally occurring isotopes? The first isotope has a mass of 84.911 and an abundance of 72.17% and the second isotope has a mass of 86.909 and an abundance of 27.83%. (T) (a) 85.91 (b) 86.35 (c) 85.47 (d) 85.17 The correct name for Na,0O; is a. Sodium oxide Sodium dioxide Disodium oxide Sodium peroxide Disodium dioxide (OT) eaos