4. Only two isotopes of element X occur naturally. Isotope 1: 50.1373 amu, abundance 52.1396 amu, abundance 82.40 %. Isotope 2: 17.60 %. Find the atomic mass = atomic mass * file, atomic weight of element X. хam, (A) The correct answer is not shown. enter (В) 50.25 amu near ed on | (C) 50.98 amu (D) 51.36 amu (E) 50.49 amu pugh- 5. Sodium azide rapidly decomposes according to the reaction 2 NaN3 (s) e else unce- 2 Na (s) +3 N2(g). How many grams of NaN3 are required to form 11.300 g of nitrogen gas? (A) 1.09e+01 g (B) 1.99e+01 g (C) The correct answer is not shown. (D) 1.75e+01 g (E) 4.78e+01 g chat egrity nves- ais as- 6. Solutions of Na2CO3(aq) and AgNO3(aq) react to le+01 | form Ag2CO3(s) and NaNO3 (aq). A solution containing 3.70 g Na2CO3 is mixed with a solution containing 5.00 g AgNO3. How many grams of Na2CO3 are present after the reaction is complete? (A) 2.14e+00 g (B) 1.08e+00 g (C) 2.39e+00 g (D) The correct answer is not shown. (E) 4.80e+00 g 7. Determine the oxidation number for Mn in KMNO4. atomic (A) The correct answer is not shown. (В) +5 (C) +3 (D) +1 (E) +7 0020 oamnlo of imnun mnrnonin m hudrnvido ia diggolvod Retake Use Photo

4. Only two isotopes of element X occur naturally. Isotope 1: 50.1373 amu, abundance 52.1396 amu, abundance 82.40 %. Isotope 2: 17.60 %. Find the atomic mass = atomic mass * file, atomic weight of element X. хam, (A) The correct answer is not shown. enter (В) 50.25 amu near ed on | (C) 50.98 amu (D) 51.36 amu (E) 50.49 amu pugh- 5. Sodium azide rapidly decomposes according to the reaction 2 NaN3 (s) e else unce- 2 Na (s) +3 N2(g). How many grams of NaN3 are required to form 11.300 g of nitrogen gas? (A) 1.09e+01 g (B) 1.99e+01 g (C) The correct answer is not shown. (D) 1.75e+01 g (E) 4.78e+01 g chat egrity nves- ais as- 6. Solutions of Na2CO3(aq) and AgNO3(aq) react to le+01 | form Ag2CO3(s) and NaNO3 (aq). A solution containing 3.70 g Na2CO3 is mixed with a solution containing 5.00 g AgNO3. How many grams of Na2CO3 are present after the reaction is complete? (A) 2.14e+00 g (B) 1.08e+00 g (C) 2.39e+00 g (D) The correct answer is not shown. (E) 4.80e+00 g 7. Determine the oxidation number for Mn in KMNO4. atomic (A) The correct answer is not shown. (В) +5 (C) +3 (D) +1 (E) +7 0020 oamnlo of imnun mnrnonin m hudrnvido ia diggolvod Retake Use Photo

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter2: Chemical Compounds

Section: Chapter Questions

Problem 2.ECP

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Similar questions

There are 1.699 1022 atoms in 1.000 g of chlorine. Assume that chlorine atoms are spheres of radius 0.99 and that they are lined up side by side in a 0.5-g sample. How many miles in length is the line of chlorine atoms in the sample?
Two elements, R and Q, combine to form two binary compounds. In the first compound, 14.0 g of R combines with 3.00 g of Q. In the second compound, 7.00 g of R combines with 4.50 g of Q. Show that these data are in accord with the law of multiple proportions. If the formula of the second compound is RQ, what is the formula of the first compound?
Gather any two of the following items, measure their dimensions, and calculate the number of atoms present in the item. a. a copper penny (pre-1983), density of copper = 8.96g/cm3 b. a nickel (assume that the nickel is pure nickel, Ni), density of nickel = 8.90g/cm3 c. a graphite pencil lead (pure carbon), density of carbon = 2.62g/cm3 d. a helium balloon (assume that the balloon is approximately spherical; the volume of a sphere is V=(43)r3, where r is the radius), density of helium gas = 0.0899 g/L
Naturally occurring silver (Ag) consists of two isotopes. One of the isotopes has a mass of 106.90509 amu and 51.84% abundance. What is the atomic mass of the other isotope?
Europium has two stable isotopes, 151Eu and 153Eu, with masses of 150.9197 u and 152.9212 u, respectively. Calculate the percent abundances of these isotopes of europium.
Click on the site (http://openstaxcollege.org/l/16PhetAtomMass) and select the Mix Isotopes tab, hide the Percent Composition and Average Atomic Mass boxes, and then select the element boron. Write the symbols of the isotopes of boron that are shown as naturally occurring in significant amounts. Predict the relative amounts (percentages) of these boron isotopes found in nature. Explain the reasoning behind your choice. Add isotopes to the black box to make a mixture that matches your prediction in (b). You may drag isotopes from their bins or click on More and then move the sliders to the appropriate amounts. Reveal the Percent Composition and Average Atomic Mass boxes. How well does your mixture match with your prediction? If necessary, adjust the isotope amounts to match your prediction. Select Nature’s mix of isotopes and compare it to your prediction. How well does your prediction compare with the naturally occurring mixture? Explain. If necessary, adjust your amounts to make them match Nature’s amounts as closely as possible. 21. Repeat Exercise 2.20 using an element that has three naturally occurring isotopes.
Neon is an inert gas with three stable isotopes. It is used in gas lasers and in advertising signs. Its isotopes and their abundances are: Ne-20 19.9924 amu 90.51% Ne-21 20.9938 amu 0.27% Ne-22 21.9914 amu 9.22% What is the average atomic mass of neon?
Strontium has four stable isotopes. Strontium-84 has a very low natural abundance, but 86Sr, 87Sr, and 88Sr are all reasonably abundant. Knowing that the atomic weight of strontium is 87.62, which of the more abundant isotopes predominates?