Sa. Using the average atomic mass of carbon, calculate the mass (in amu) of 137 carbon atoms.b. Using the average atomic mass of potassium, calculate the mass (in amu) of 7.60 x 106 potassium atoms.amuc. Using the average atomic mass of lithium, calculate the mass (in amu) of 4.90 x 1023 of lithium atoms.amuSubmit Answerd. Using the average atomic mass of magnesium, calculate the mass (in amu) of 3 magnesium atoms.amuShow Hinte. Using the average atomic mass of iodine, calculate the mass (in amu) of 3.300 x 1023 iodine atoms.amuamuRetry Entire Group8 more group attempts remainingPreviousNextSave and Exit

We have to calculate the mass of atoms from the average atomic masses of the given atoms.

a. Using the average atomic mass of carbon, calculate the mass (in amu) of 137 carbon atoms. amu b. Using the average atomic mass of potassium, calculate the mass (in amu) of 7.60 x 106 potassium atoms. amu c. Using the average atomic mass of lithium, calculate the mass (in amu) of 4.90 x 1023 of lithium atoms. Submit Answer amu d. Using the average atomic mass of magnesium, calculate the mass (in amu) of 3 magnesium atoms.. amu e. Using the average atomic mass of iodine, calculate the mass (in amu) of 3.300 x 1023 iodine atoms. amu Retry Entire Group 8 more group attempts remaining

a. Using the average atomic mass of carbon, calculate the mass (in amu) of 137 carbon atoms. amu b. Using the average atomic mass of potassium, calculate the mass (in amu) of 7.60 x 106 potassium atoms. amu c. Using the average atomic mass of lithium, calculate the mass (in amu) of 4.90 x 1023 of lithium atoms. Submit Answer amu d. Using the average atomic mass of magnesium, calculate the mass (in amu) of 3 magnesium atoms.. amu e. Using the average atomic mass of iodine, calculate the mass (in amu) of 3.300 x 1023 iodine atoms. amu Retry Entire Group 8 more group attempts remaining

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter2: Atoms, Molecules, And Ions

Section: Chapter Questions

Problem 43E: Early tables of atomic weights (masses) were generated by measuring the mass of a substance that...

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Copper atoms. (a) What is the average mass of one copper atom? (b) Students in a college computer science class once sued the college because they were asked to calculate the cost of one atom and could not do it. But you are in a chemistry course, and you can do this. (See E. Felsenthal, Wall Street Journal, May 9, 1995.) If the cost of 2.0-mm diameter copper wire (99.9995% pure] is currently 41.70 for 7.0 g, what is the cost of one copper atom?
Copper: (a) Suppose you have a cube of copper metal that is 0.236 cm on a side with a mass of 0.1206 g. If you know that each copper atom (radius = 128 pm) has a mass of 1.055 1022 g (you will learn in Chapter 2 how to find the mass of one atom), how many atoms are there in this cube? What fraction of the cube is filled with atoms? (Or conversely, how much of the lattice is empty space?) Why is there empty space in the lattice? (b) Now look at the smallest, repeating unit of the crystal lattice of copper. Knowing that an edge of this cube is 361.47 pm and the density of copper is 8.960 g/cm3, calculate the number of copper atoms in this smallest, repeating unit.
The element europium exists in nature as two isotopes: 151Eu has a mass of 150.9196 u and 153Eu has a mass of 152.9209 u. The average atomic mass of europium is 151.96 u. Calculate the relative abundance of the two europium isotopes.
A cube of sodium has length 1.25 in. How many atoms are in that cube? (Note: dNa=0.968 g/cm3.)
An element X bas five major isotopes, which are listed below along with their abundances. What is the element? Isotope Percent Natural Abundance Mass (u) 46x 8.00% 45.95232 47x 7.30% 46.951764 48x 73.80% 47.947947 49x 5.50% 48.947841 50x 5.40% 49.944792
The following chart shows a general decline in abundance with increasing mass among the first 30 elements. The decline continues beyond zinc. Notice that the scale on the vertical axis is logarithmic, that is, it progresses in powers of 10. The abundance of nitrogen, for example, is 1/10,000 (1/104) of the abundance of hydrogen. All abundances are plotted as the number of atoms per 102 atoms of H. (The fact that the abundances of Li, Be, and B, as well as those of the elements near Fe, do not follow the general decline is a consequence of the way that elements are synthesized in stars.) (a) What is the most abundant main group metal? (b) What is the most abundant nonmetal? (c) What is the most abundant metalloid? (d) Which of the transition elements is most abundant? (e) Which halogens are included on this plot, and which is the most abundant?
Consider the following data for three binary compounds of hydrogen and nitrogen: %H (by Mass) %N (by Mass) I 17.75 82.25 II 12.58 87.42 III 2.34 97.66 When 1.00 L of each gaseous compound is decomposed to its elements, the following volumes of H2(g) and N2(g) are obtained: H2(L) N2(L) I 1.50 0.50 II 2.00 1.00 III 0.50 1.50 Use these data to determine the molecular formulas of compounds I, II, and III and to determine the relative values for the atomic masses of hydrogen and nitrogen.
Indium oxide contains 4.784 g of indium for every 1.000 g of oxygen. In 1869, when Mendeleev first presented his version of the periodic table, he proposed the formula In2O3 for indium oxide. Before that time it was thought that the formula was InO. What values for the atomic mass of indium are obtained using these two formulas? Assume that oxygen has an atomic mass of 16.00.
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?
Natural rubidium has the average mass of 85.4678 u and is composed of isotopes 85Rb (mass = 84.9117 u) and 87Rb. The ratio of atoms 85Rb/ 87Rb in natural rubidium is 2.591. Calculate the mass of 87Rb.
These questions concern the work of J. J. Thomson: From Thomson’s work, which particles do you think he would feel are most important in the formation of compounds (chemical changes) and why? Of the remaining two subatomic particles, which do you place second in importance for forming compounds and why? Come up with three models that explain Thomson’s findings and evaluate them. To be complete you should include Thomson’s findings.
Early tables of atomic weights (masses) were generated by measuring the mass of a substance that reacts with 1.00 g of oxygen. Given the following data and taking the atomic mass of hydrogen as 1.00, generate a table of relative atomic masses for oxygen, sodium, and magnesium. Element Mass That Combines with 1.00g Oxygen Assumed Formula Hydrogen 0.126 g HO Sodium 2.875 g NaO Magnesium 1.500 g MgO How do your values compare with those in the periodic table? How do you account for any differences?