Answers
Part A:
Isotopes are atoms of the same element, having different atomic masses.
Average atomic mass of the iostopes = weighted average of the mass of all the isotopes
Average mass of the copper discovered = 69.15% of 63 amu + 30.85% of 65 amu
Average mass of the copper discovered = {(69.15/100) x 63 amu} + {(30.85/100) x 65 amu}
= 43.5645 + 20.0525 = 63.62 amu
NOTE: The average atomic mass value is closer to the atomic mass of the more abundant isotope.
Part B:
Average mass of the silicon discovered = 73.71% of 27.98 amu + 14.93% of 28.98 amu + 11.36% of 29.97 amu
Average mass of the silicon discovered = {(73.71/100) x 27.98 amu} + {(14.93/100) x 28.98 amu} + {(11.36/100) x 29.79 amu}
Average mass of the silicon discovered = 20.624058 + 4.326714 + 3.384144 = 28.33 amu
Similar Solved Questions
1 answer
Advantages and disadvantages of historical method(compare with variance-covariance method )?please use your own words to explain,thanks.
Advantages and disadvantages of historical method(compare with variance-covariance method )?please use your own words to explain,thanks....
1 answer
Problem 22 Intro One year ago, Gangnam Inc. issued a 12-year, 5% coupon bond at its...
Problem 22 Intro One year ago, Gangnam Inc. issued a 12-year, 5% coupon bond at its par value of $1,000. This bond makes annual, not semi-annual payments. The bond can be called in 8 years at a price of $1,100 and it now sells for $785.83. The bond has a yield to maturity of 8%. - Attempt 1/5 for 10...
1 answer
The dice game craps is played as follows. The player throws two dice and if the...
The dice game craps is played as follows. The player throws two dice and if the sum is seven or eleven, the player wins. If the sum is two, three, or twelve the player loses. If the sum is anything else, the player continues throwing until either that same number is thrown again (in which case the p...
1 answer
Express the confidence interval 0.666<p<0.888 in the form DIE +E=0+0
Express the confidence interval 0.666<p<0.888 in the form DIE +E=0+0...
1 answer
Find å shown in the circuit. w va 323 You 221 Ž 32 512 M con
Find å shown in the circuit. w va 323 You 221 Ž 32 512 M con...
1 answer
Exercise 1-8 Product Costs and Period Costs; Variable and Fixed Costs [LO1-3, LO1-4] Kubin Company's relevant...
Exercise 1-8 Product Costs and Period Costs; Variable and Fixed Costs [LO1-3, LO1-4] Kubin Company's relevant range of production is 23,000 to 27,500 units. When it produces and sells 25,250 units, its average costs per unit are as follows: Average Cost per Unit $ 8.30 $ 5.30 $ 2.80 $ 6.30 $ 4.8...
1 answer
QUESTION 6 20 people are on a team. 12 from accounting and 8 from marketing. 3...
QUESTION 6 20 people are on a team. 12 from accounting and 8 from marketing. 3 people from accounting have been trained on the new software. 7 people from marketing have been trained on the new software. A person is chosen at random. If the person is from accounting, what is the probability that the...
1 answer
Dan Louis is the supervisor of the Assembly Department of Wiggerman Corporation. He has control over and...
Dan Louis is the supervisor of the Assembly Department of Wiggerman Corporation. He has control over and is responsible for manufacturing costs traced to the department. The Assembly Department is an example of a(n): a) cost center. b) inventory center. c) supervised work cente...
1 answer
What is dysrhythmia with emaphasis on the actual ecg tracing comparing it to the normal sinus...
what is dysrhythmia with emaphasis on the actual ecg tracing comparing it to the normal sinus rythm? how you describe the ecg wave?...
1 answer
These are about Misti also known as Putina in Peru QUESTION 1 What is the tectonic...
these are about Misti also known as Putina in Peru QUESTION 1 What is the tectonic setting for this feature at -16.300 -71.406? divergent plate boundary convergent plate boundary intraplate QUESTION 2 What is the geological setting for this feature? island ard continental rift continental arc co...
1 answer
Hello, I need help with Question 7. Please show all the steps and the solutions of the problem. Thank you very much. 7. Consider a game that consists of drawing a single card at random from a standar...
Hello, I need help with Question 7. Please show all the steps and the solutions of the problem. Thank you very much. 7. Consider a game that consists of drawing a single card at random from a standard deck of 52 cards. You pay S3 to play the game, and the money is not returned. If you draw an ace, ...
1 answer
Please show full details steps for better understanding. Thank you. 5. An experiment was conducted to...
Please show full details steps for better understanding. Thank you. 5. An experiment was conducted to measure and compare the effectiveness of various feed supplements on the growth of chickens. Use the software output to answer the following questions: Chick Weights 400 casei - horsebean Anseed m...
1 answer
Multiple Choice Question Consider the following sample: 16, 13, 10, 17, 16, 14, 5, 12, 15,...
Multiple Choice Question Consider the following sample: 16, 13, 10, 17, 16, 14, 5, 12, 15, 8, 9, 10, 15, 22, 8. Calculate the variance and interquartile range of the sample, respectively. A. 19.38; 7 B. 15.7; 7 C. 4.40; 7 D. 19.38; 7.5 E. 19.38; 6.5 Multiple Choice Question Assume that the monthly r...
1 answer
Find an organization related to your health care discipline and identify the mission and vision statement....
Find an organization related to your health care discipline and identify the mission and vision statement. Based on your experiences as a member of the health care team, explain how the values of the organization are or are not reflected in these statements....
1 answer
UL. Suffolk University in B... on.com omework Set A Search and select to P Ouiz Two...
UL. Suffolk University in B... on.com omework Set A Search and select to P Ouiz Two Prep - 10FA-.. Solved: Holywood Huron Company produces a commercial cleaning compound known as Zoom. The direct materials and direct labor standards for one! unit of Zoom are given below: Direct materials Direct labo...
1 answer
Layout References Mailings Review View A A Aa A Eva * ALAM AaBbCcDdE AaBbCcDdE AaBbCcD ABCD...
Layout References Mailings Review View A A Aa A Eva * ALAM AaBbCcDdE AaBbCcDdE AaBbCcD ABCD El AaBb Bb CODE No Spacing Heading1 Heading 2 Subtitle Part D. Double Fertilization 24. Why is "triploid" an appropriate description of the endosperm nucleus? 25. Is the zygote haploid, diploid, or tr...
1 answer
Question 8 Skysong Corporation has pretax financial income (or loss) equal to taxable income (or loss) from 2...
Question 8 Skysong Corporation has pretax financial income (or loss) equal to taxable income (or loss) from 2009 through 2017 as follows: Income (Loss) Tax Rate 2009 $34,800 30 % 2010 48,000 30 % 2011 20,400 35% 57,600 50% 2013 (180,000) 40 % 2014 100,000 40 % 2015 36,000 2016 126,000 40 2017 (72,00...
1 answer
What occurred at Wounded Knee? Where and when did it take place, and how was this event significant In the lives of Native Americans?
What occurred at Wounded Knee? Where and when did it take place, and how was this event significant In the lives of Native Americans?...