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Question 36 1 pts Which of the following is the most naturally abundant isotope of Nitrogen...
Using the periodic table, which isotope is probably the most abundant isotope of potassium (K)? 41 K 39 K 38.10 K 19 K 40 K Lithium forms compounds which are used in dry cells and storage batteries and in high-temperature lubricants. It has two naturally occurring isotopes, Li (atomic mass = 6.015121 amu) and 7Li (atomic mass 7.016003 amu). What is the percent abundance of lithium-6? You should use the periodic table to help you answer this. 7.5% 92.5% 86.7%...
Question 12 • Which of the followings are the most abundant elements in organisms? carbon, oxygen, nitrogen, calcium carbon, hydrogen, nitrogen, oxygen carbon, sodium, hydrogen, nitrogen carbon, oxygen, phosphorus, hydrogen oxygen, hydrogen, calcium, nitrogen Question 13 Why is each element unique and different from other elements in chemical prope
1 (6)Uranium has three naturally occurring isotopes 22U, 235s2U, and 3 2U. The isotope Uranium-235is considered to be "weapons grade uranium" and can be used to make atomic weapons. The fractional abundances for two of the uranium isotopes are uranium-238-99.274% and Uranium-234-0.005%. The molecular mass of natural uranium is 237.9758amu. What is the fractional abundance of weapons grade uranium using these numbers (note: the number on the periodic table takes into account isotopes that aren't natural so use the numbers...
Question 1 1 pts Which of the following statements is incorrect? Isotope dilution is a technique used to determine the quantity of a substance in a mixture by adding a known amount of an isotope to it. O Isotope dilution was used to elucidate the biological pathways of photosynthesis. O Isotope dilution may be used to determine the amount of vitamin B12 in food. O A radioactive tracer is a very small amount of a radioactive isotope added to a...
Question 2 3 pts Assume an isotope of the hypothetical element bulldogium, Bd. 1. Bd, is discovered. Into what group would Bd be placed on the periodic table? 02
which compound is burning when potassium and water are mixed together Question 23 0.1 pts Which compound is burning when potassium and water are mixed together? OK(8) O H2O ( окон No answer text provided. Question 24 02 pts Which of the following is more reactive with liquid water? OL O Na OK No answer text provided. Question 25 0.2 pts Calculate AH for the following reaction in the presence of an acid catalyst: C12H2011 + 12C (8) + 11H20...
Question 32 4 pts a. Given the data presented in the table below, the birds with which "beak" will be most successful at survival and reproduction this year? b. Given the data presented in the table below (and assuming that the birds started with 50 of each seedi type), which plants will be most abundant next year? Beak # Kidney. # Lima beans beans eaten (15 eaten (10 cal) cal) # Peas eaten (5 cal) # Grass seeds eaten (1...
Question 18 1 pts Which of the following isotopes contributes to the total molecular mass of 24.31amu? Mg-25 No answer text provided. Mg-26 O Mg-24
Question 4 1 pts Here is an array which has just been partitioned by the first step of quicksort: 3, 0, 2, 1, 7,. 15. 11, 20, 13 Which of these elements was the pivot? 0 7 0 1 o 20 O 15 Question 5 1 pts Running merge sort on an array of size n which is already sorted is O(n2) O O(n log n O Ollog n
Question 1 5 pts What is the the most stable chair conformation? No answer text provided. Equitorial Axial No answer text provided.