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18. Hypothetical element Z. has three naturally occurring isotopes, z , andz Calculate the atomic mass...
5) Calculate the atomic mass of an imaginary element X that has 3 naturally occurring isotopes with the following masses and natural abundances: 106.90509 amu 108.90476 amu 107.91536 amu 51.84% 38.46% 9.70% A) 106.80 amu B) 108 amu C) 107.77 amu D) 108.32 amu E) 107.8 amu
10) Calculate the atomic mass of element "X" if it has two naturally occurring isotopes with the following masses and natural abundances: 44.8776 g/mol 46.9443 g/mol X-45 32.88% 67.12% X-4 A) 46.34 g/mol B) 46.84 g/mol c) 44.99 g/mol D) 45.91 g/mol E) 45.60 g/mol F) 46.26 g/mol 11) Solving the Schrödinger equation does NOT allow determination of what property of an electron? A) Energy of the electron B) The exact location of the electron with 100 % certainty C)...
2. An element has 2 naturally occurring isotopes with the following masses and abundances A. Calculate the atomic weight of the element. (20 pts) Isotope mass Percentage 34.97 amu 75.78% 36.97 amu 24.22% B. What is the element? C. How many neutrons does the heavier isotope have? (Round to whole number) D. How many electrons does the element have? E. What type(metal/nonmetal) of element is it? F. If the element above gains 1 electron what neutral element has the some...
14. How many protons are there in an atom of uranium whose mass number is 235? A) 92 B) 143 C) 235 D) 238 E) 327 Therefore, the name of HCIO, is 15. The chemical name for CIO, is chlorite ion. A) hydrochloric acid B) chloroform C) hydrogen dioxychloride D) chlorous acid E) chloric acid 16. Which of the following elements is chemically similar to potassium? A) calcium B) arsenic C) phosphorus D) cerium E) cesium 17. Which one of...
d. NH4(C5Ohm e. (NH4)2CO3 47. Which of the following are incorrectly paired a) Sr, alkaline earth metal b) Ta, transition metal c) F, halogen d) As, halogen e) , transition metal 48. Which of the following are incorrectly paired? a) Phosphorus, Pr b) Palladium, Pd c) Platinum, Pt d) Lead, Pb e) Potassium, K 49. Which of the following names is incorrect? a) cobalt(II) chloride b) magnesium oxide c) aluminum(III) oxide d) diphosphorus pentoxide e) All of the above names...
Question 3 (2.5 points) Chlorine has two naturally occurring isotopes. The isotope C1-35 (mass = 35.0 amu) makes up 75.8% of the sample, and the isotope CH-37 (mass = 37.0 amu) makes up 24.2% of the sample. What is the average atomic mass for chlorine? A) 36.0 amu B) 35 amu C) 36.6 amu D) 35.5 amu E) 35.521 amu
need some explaining plaz. ke ke 12. Calculate the atomic weight of Kelsium, a fictional element, if it consists of two isotopes with the following abundance and masses: 11.99 amu 66.00% 13.98 amu 34.0096 A. 11:44 amu B. 8.958 amu C. 13.01 amu D 12.67 amu E 25.97 amu 13. Which of the following can we conclude from the atomic weight of boron which is comprised of just boron-10 and boron-11? A Boron-11 is the most abundant isotope. B Boron-10...
23. An ion is formed a) By either adding or subtracting protons from the atom. b) By either adding or subtracting electrons from the atom. c) By either adding or subtracting neutrons from the atom. d) All of the above are truc. e) Two of the above are true. 24. The symbol for the rubidium ion is a. Rb b. R c. R2 d. Ru Rb+1 Rb c. 25. Which of the following formulas is incorrect? a. AIO sb. KBr...
25) Calculate the molecular mass of tetraphosphorus decaoxide, P4010. a corrosive substance which can be used as a drying agent. A) 469.73 amu B) 190.97 amu C) 139.88 amu D) 94.97 amu E) 283.88 amu 26) What is the percent sodium in sodium carbonate? A) 45.3% B) 11.3% 21.7% D) 43.4% E) 27.7% 27) What is the chemical name of FeSO3. A) Iron sulfate B) Iron(III) sulfate C) Iron(II) sulfite D) Iron sulfur trioxide E) None of the above names...
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...