Dr. Kent McCorkle, or "Dr. Kent' to his student, has helped thousands of students be successful in chemistry.
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[Miss part one? Check out Atomic Mass Calculations I.] [Download the accompanying PDF worksheet.] 1. Magnesium has three naturally occurring isotopes, 24Mg (78.99%, 23.9850 amu), 25Mg (10.00%, 24.9858 amu), and 26Mg. Determine the percent abundance and isotopic mass of 26Mg. … Read More
[Download the accompanying PDF worksheet.] Calculate the Average Atomic Mass Calculate the average atomic mass of an element with two naturally occurring isotopes: 85X (72.15%, 84.9118 amu) and 87X (27.85%, 86.9092 amu). What is this element? Chromium has the following … Read More
[View the accompanying Lesson on Heat & Specific Heat Capacity here.] [Download the accompanying PDF worksheet here.] Perform the following calculations, being sure to give the answer with the correct number of significant digits. A car with magnesium wheels is parked … Read More
[View the accompanying Lesson on Compound Unit Conversions here.] [Download the accompanying PDF worksheet here.] Perform the following calculations, being sure to give the answer with the correct number of significant digits. A certain medication is set to deliver through an … Read More
[View the accompanying Lesson on Significant Digits & Calculations here.] [Download the accompanying PDF worksheet here.] Perform the following calculations, being sure to give the answer with the correct number of significant digits. 8.010 × 41.907 993.4 ÷ 6.022 76.0 – 38.119 … Read More
[View the accompanying Lesson on Significant Digits & Measurements here.] [Download the accompanying PDF worksheet here.] How many significant digits does each of the following numbers have ? 42,784 cm 120 mi 9842.010 kg 0.0819 sec 0.000200500 ft 4300. lb 8.600°C 0.553092 … Read More
