*BIUA:Heading 1Russo One30CHDElement: MagnesiumNumber ofNumber ofAbundanceAbundanceName of isotopeMass (amu)(%)(decimal)ProtonsNeutronsMagnesium-2423.98578.99%Magnesium-2524.98610.00%Magnesium-2625.98311.01%IsotopeMass Abundance Humber of Humber ofProtonsElement: UraniumMass(amu)AbundanceAbundanceHame of isotopeHeutrons(%)(decimal)Uranium-234234.041 0.0055%Uranium-235235.0440.72%Uranium-238238.051 99.2745%IsotopeMass Abundance

Mass number is sum of protons and neutrons in a nucleus.

Answered: unisauaPIAL :ua ar Number of Neutrons…

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter1: Excel Basics

Section: Chapter Questions

Problem 4P

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The following diagram is a representation of 20 atoms ofa fictitious element, which we will call nevadium (Nv).The red spheres are 293Nv, and the blue spheres are 295Nv.(a) Assuming that this sample is a statistically representativesample of the element, calculate the percent abundanceof each element. (b) If the mass of 293Nv is 293.15 amu andthat of 295Nv is 295.15 amu, what is the atomic weight of Nv?[Section 2.4]
A gaseous binary compound has a vapor density that is 2.53 times that of nitrogen at 100°C and atmospheric pressure. When 8.21 g of the gas reacts with AlCl3 at 100°C, 1.62 g gaseous nitrogen is produced, removing all of the nitrogen originally present.(a) Estimate the molecular mass of the gaseous compound.(b) How many nitrogen atoms are there in a molecule ofthe compound?(c) What is the maximum possible value of the atomicmass of the second element?(d) Are other values possible for the atomic mass of thesecond element? Use a table of atomic masses to identify the element that best fits the data.(e) What is the molecular formula of the compound?
The following diagram is a representation of 20 atoms ofa fictitious element, which we will call nevadium (Nv).The red spheres are 293Nv, and the blue spheres are 295Nv.(a) Assuming that this sample is a statistically representativesample of the element, calculate the percent abundanceof each element. (b) If the mass of 293Nv is 293.15 amu andthat of 295Nv is 295.15 amu, what is the atomic weight of Nv?
The natural isotopes of sulfur and their molar masses and mass fractions are respectively 2210S: 33.96786 g mol-1, 0.950; 2310S: 32.97146 g mol-1, 0.0076; 2410S: 33.96786 g mol-1, 0.0422; Find the molar mass of the element, given that 2610S: 35.96709 g mol-1, 0.0002.
Below is a representation of 50 atoms of a fictitious element called westmontium (Wt)(Wt). The red spheres represent WtWt-296, the blue spheres WtWt-297, and the green spheres WtWt-298. A)Assuming that the sample is statistically representative of a naturally occurring sample, calculate the percent natural abundance of WtWt-296 isotope. Natural abundance of WtWt-296? B)Assuming that the sample is statistically representative of a naturally occurring sample, calculate the percent natural abundance of WtWt-297 isotope. Natural abundance of WtWt-297? C)Assuming that the sample is statistically representative of a naturally occurring sample, calculate the percent natural abundance of WtWt-298 isotope. Natural abundance of WtWt-298?
Element XYZ has two isotopes: XYZ-79 (mass =69.9943 amu) and XYZ-81 (mass=80.9893 amu). If the relative percent abundancy of XYZ-79 is 50.6865% while XYZ-81 is 49.3135%, calculate for the average molar mass of XYZ. Express your answer in 3 significant figures.
The diameter of a carbon atom is 1.54 A° . (a) Express thisdiameter in picometers. (b) How many carbon atoms could bealigned side by side across the width of a pencil line that is0.20 mm wide?
In the early 1900s, Ernest Rutherford produceda beam of very small positive particles and directed it at a thinpiece of gold foil just a few atoms thick. Most of the particlespassed through the foil without changing their path; very rarely, aparticle was deflected. What conclusions can you draw from thisexperiment about the structure of an atom?
An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass 205.9745 u, 22.10% of an isotope with mass 206.9759 u, and 52.40% of an isotope with mass 207.9766 u. Calculate the average atomic mass and identify the element.
A sample of a uranium compound is found to be losingmass gradually. Explain what is happening to the sample.
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unisauaPIAL :ua ar Number of Neutrons Number of Abundance Abundance Name of isotope Mass (amu) (%) (decimal) Protons Magnesium-24 23.985 78.99% Magnesium-25 24.986 10.00% Magnesium-26 25.983 11.01% Isotope Mass Abundance