11. Write the symbol for each of the following ions: (a) the ion with a 1+...
11. Write the symbol for each of the following ions:
(a) the ion with a 1+ charge, atomic number 55, and mass number 133
(b) the ion with 54 electrons, 53 protons, and 74 neutrons
(c) the ion with atomic number 15, mass number 31, and a 3− charge
(d) the ion with 24 electrons, 30 neutrons, and a 3+ charge
22. An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu, and 8.82% abundance with 21.99 amu. Calculate the average atomic mass of this element.
39. Which contains the greatest mass of oxygen: 0.75 mol of ethanol (C2H5OH), 0.60 mol of formic acid
(HCO2H), or 1.0 mol of water (H2O)? Explain why.
58. One 55-gram serving of a particular cereal supplies 270 mg of sodium, 11% of the recommended daily allowance. How many moles and atoms of sodium are in the recommended daily allowance?
Please answer all of these questions with all work works shown thank you.
Homework Answers
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11. Write the symbol for each of the following ions:
(a) the ion with a 1+...
During a mass spectrometry experiment you were able to obtain the atomic mass and relative abundances...
During a mass spectrometry experiment you were able to obtain the atomic mass and relative abundances of an unknown element. What is the name of this element, how you determine the element based off of the information given? The unknown has three naturally occurring isotopes: 19.99 amu at 90.92%, 20.99 amy at 21.99%, and 21.99 amu at 8.82%.
A is atomic mass number and Z is atomic number 5. Complete the table below -remember Net #of neutrons electrons ch...
A is atomic mass number and Z is atomic number 5. Complete the table below -remember Net #of neutrons electrons charge #of symbol #of protons 238a2U 20 2+ 20 899Y 39 36 35 44 15 16 3- Show your work- LO 24Mg, 25Mg and 26Mg. 6. Calculate the elemental atomic mass of Mg if the naturally occurring isotopes Their masses and abundances are as follows: Isotope Atomic 24-Mg 25-Mg 26-Mg are Mass Isotopic 23.98504 amu Abundance 78.70% 24.98584 amu 10.13%...
1. (2 pts) Given the name or symbol for an element and its mass#, Fill in...
1. (2 pts) Given the name or symbol for an element and its mass#, Fill in the table: Element # protons # neutrons # electrons 87Rb+ 128Te-2 2. (3 pts) Write the correct symbol and charge for the following: An atom with 47 protons, mass number 107, and 46 electrons. An atom with 2 more electrons than protons, mass number 80, and 46 neutrons. Write the atomic symbol for the element whose ion has a 2- charge, has 20 more...
2. An element has 2 naturally occurring isotopes with the following masses and abundances A. Calculate...
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...
An ion has a mass number of 65, 36 neutrons, and a charge of +1. Identify...
An ion has a mass number of 65, 36 neutrons, and a charge of +1. Identify the element symbol, and determine the number of protons and electrons in this ion. element symbol: number of protons: number of electrons:
Multiple-Cholce: Select the best answer to each of these multiple choice 1. Which of the following...
Multiple-Cholce: Select the best answer to each of these multiple choice 1. Which of the following descriptions of a subatomic particle is correct? a) A proton has appositive charge and a mass of approximately 1 amu 9. b) An electron has a negative charge and a mass of approximately 1 amu c) A neutron has no charge and its mass is negligible d) A proton has appositive charge and a negligible mass. e) A neutron has appositive charge and a...
Give the number of protons, electrons, and neutrons in each of the following: a. ^10 5...
Give the number of protons, electrons, and neutrons in each of the following: a. ^10 5 B b. ^199 80 Hg c. ^63 29 Cu d. ^77 34 Se Write the symbol for each of the following ions: a. the ion with 3+charge, 28 electrons, and a mass number of 71 b. the ion with 36 electrons, 35 protons, and 45 neutrons c. the ion with 86 electrons, 142 neutrons, and a 4 + charge d. the ion with a...
Question 10 of 21 > Identify the missing information for each atom or ion. Note that...
Question 10 of 21 > Identify the missing information for each atom or ion. Note that the atoms and ions are not necessarily neutral. A Se ion has a mass number of 78 and a charge of 2. Determine the number of neutrons, protons, and electrons in this ion. number of neutrons: number of protons: number of electrons: An ion has a mass number of 65, 36 neutrons, and a charge of 1. Identify the element symbol, and determine the...
2 & 3 please. 2. Write the name of the element for each symbol. a. He...
2 & 3 please.
2. Write the name of the element for each symbol. a. He b. P e. Na e. Ca f. Br g. Cd d. As h. Si Complete the following table for a neutral atom of each element: Name Number Number Number of the Atomic Mass of Element Symbol Number Number Protons Neutrons Electrons of of Calcium 42 56 138
1. An aqueous solution of zinc(II) fluoride is prepared by dissolving 5.61 g of zinc(II) fluoride...
1. An aqueous solution of zinc(II) fluoride is prepared by dissolving 5.61 g of zinc(II) fluoride in 7.58×102 g of water. The density of the solution is 1.42 g mL-1. Determine the molarity (in mol/L) of zinc(II) fluoride in the solution. 2. An element consists of two isotopes with the following natural abundances: Natural Abundance (%) Atomic Mass (amu) isotope 1 47.079 107.440 isotope 2 52.921 ? If the average atomic mass of the element is 107.964 amu, calculate the...
During a mass spectrometry experiment you were able to obtain the atomic mass and relative abundances of an unknown element. What is the name of this element, how you determine the element based off of the information given? The unknown has three naturally occurring isotopes: 19.99 amu at 90.92%, 20.99 amy at 21.99%, and 21.99 amu at 8.82%.
A is atomic mass number and Z is atomic number 5. Complete the table below -remember Net #of neutrons electrons charge #of symbol #of protons 238a2U 20 2+ 20 899Y 39 36 35 44 15 16 3- Show your work- LO 24Mg, 25Mg and 26Mg. 6. Calculate the elemental atomic mass of Mg if the naturally occurring isotopes Their masses and abundances are as follows: Isotope Atomic 24-Mg 25-Mg 26-Mg are Mass Isotopic 23.98504 amu Abundance 78.70% 24.98584 amu 10.13%...
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...
An ion has a mass number of 65, 36 neutrons, and a charge of +1. Identify the element symbol, and determine the number of protons and electrons in this ion. element symbol: number of protons: number of electrons:
Multiple-Cholce: Select the best answer to each of these multiple choice 1. Which of the following descriptions of a subatomic particle is correct? a) A proton has appositive charge and a mass of approximately 1 amu 9. b) An electron has a negative charge and a mass of approximately 1 amu c) A neutron has no charge and its mass is negligible d) A proton has appositive charge and a negligible mass. e) A neutron has appositive charge and a...
Give the number of protons, electrons, and neutrons in each of the following: a. ^10 5 B b. ^199 80 Hg c. ^63 29 Cu d. ^77 34 Se Write the symbol for each of the following ions: a. the ion with 3+charge, 28 electrons, and a mass number of 71 b. the ion with 36 electrons, 35 protons, and 45 neutrons c. the ion with 86 electrons, 142 neutrons, and a 4 + charge d. the ion with a...
Question 10 of 21 > Identify the missing information for each atom or ion. Note that the atoms and ions are not necessarily neutral. A Se ion has a mass number of 78 and a charge of 2. Determine the number of neutrons, protons, and electrons in this ion. number of neutrons: number of protons: number of electrons: An ion has a mass number of 65, 36 neutrons, and a charge of 1. Identify the element symbol, and determine the...
2 & 3 please.
2. Write the name of the element for each symbol. a. He b. P e. Na e. Ca f. Br g. Cd d. As h. Si Complete the following table for a neutral atom of each element: Name Number Number Number of the Atomic Mass of Element Symbol Number Number Protons Neutrons Electrons of of Calcium 42 56 138
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