Atomic weight calculator
[DOC File]CHEMISTRY WORKSHEET # 2 MOLE PROBLEMS—THE MOLE …
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Molar mass tells us the mass (“weight”) of 1 mol ofan atom or compound. In each case . we simply calculate the sum of the “weights” of the atoms in the formula to determine the weight of a mole. These weights can be found on the periodic table. EXAMPLE: Calculate the molar mass (gram molecular weight) of a mole of iodine, I2.
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Calculate the weighted mass so that each isotope contributes to the overall atomic mass of Calorium and record the values in column 6: % distribution x mass of isotope (column 3) = weighted mass. 100. Calculate the atomic mass of Calorium by adding up all of the weighted masses in column 6.
[DOC File]1970
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In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. Nitric acid is added, and the reaction proceeds to give a hydrated tin(IV) oxide plus NO2 and H2O. The hydrated tin(IV) oxide is then heated strongly and reacts as follows: SnO2.xH2O(s) SnO2(s) + xH2O(g)
[DOC File]DAY 1: ATOMIC STRUCTURE & AVERAGE ATOMIC MASS
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2. Two isotopes are known for Element Y. 35.0% of all the atoms of Element Y have an atomic mass of . amu. 65.0% of the isotopes have an atomic mass of 32.0amu. Find the average atomic mass of Element Y. 29.7 (0.35) + 32.0 (0.65) = 31.195amu. 3. Element Z has three isotopes. The atomic mass and abundance of each is given below.
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To figure out the number of electrons you take 15-(-3) which equals 18 electrons. Neutrons can be factored in when you have the atomic mass given. The average atomic mass subtracting the number of protons will give you the number of neutrons. All the isotopes of an element are factored into the average atomic mass based on their percent abundance.
Modeling Isotopes – Calculating the Atomic Mass of “Snackium”
Mass number Exact weight (amu) Percent Abundance 12 12.000000 98.90 13 13.003355 1.10 Find the average atomic mass for silicon, and check your answer. Mass number Exact Weight (amu) Percent Abundance 28 27.976927 92.23 29 28.976495 4.67 30 29.973770 3.10 Find the average atomic mass for molybdenum and check your answer.
[DOC File]AP Chemistry – Chapters 1 and 2
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Compute numbers in scientific notation using a calculator. Be familiar with the following terms: atom, element, molecule, compound, mixture, homogeneous, heterogeneous, extensive, intensive. Decide if a digit in a number is "significant" Round answers to arithmetic problems to reflect the precision of the number. AP Study Guide for Chapter 2
[DOC File]Mole Conversion Worksheet
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Step 2: Create a conversion factor by using your periodic table to find the atomic weight of the element/compound you are given. Step 3: Write what you know, in a fraction, over 1. Step 4: In a second fraction, place your labels so that the bottom label will cancel out the top label; whatever label you are trying to solve for should then go on ...
[DOC File]Mole Conversion Worksheet
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: Create a conversion factor by using your periodic table to find the atomic weight of the element/compound you are given. Step 3: Write what you know, in a fraction, over 1. Step 4: In a second fraction, place your labels so that the bottom label will cancel out the top label; whatever label you are trying to solve for should then go on the top.
[DOC File]Fermi Questions - Science Olympiad
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Some Facts. Gold, atomic weight 197 and atomic number 79, has a nuclear radius of 7.3x10-15 m and an atomic radius of 1.3x10-10 m. A proton and neutron are of equal mass and 2000 times more massive than an electron. The Sun has a diameter of 1.4x106 km …
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