9. Protons Neutrons 64 +1 Electrons 30 Zn

Q: 39. A 540-g aluminum rod contains A. 20.0 mol of aluminum B. 540 Al atoms C. 1.2 x 1024 Al atoms D.…

A: A) Moles = Mass / Molar Mass Molar Mass of Al= 26.98 g/mol So Moles of Al= 540 /26.98…

Q: What is 16 protons+ 16 neutrons 18 electrons

A:

Q: 4. Copper is found in nature as two isotopes, 63Cu (69.0%) with a mass of 62.93 amu and 65Cu (31.0%)…

A: Average atomic mass of copper can be determined using the following equation.

Q: How many atoms are contained in a titanium sphere having a diameter of 4.00 mm? The density of…

A: Given : density of titanium = 4.506 g/cm3  And diameter of sphere = 4.00 mm  Since 1 cm = 10 mm…

Q: . An element has three stable isotopes with masses of 27.977 amu, 28,976 amu, and 29.973 amu. The…

A:

Q: In a sample of gallium there is 60.2% of gallium-69 (68.9 amu) atoms and 39.8% of gallium-71 (70.9…

A:

Q: Question attached

A: When two atoms have same atomic number and different mass number, they are called as isotopes.

Q: 17) You have 19 protons, 19 electrons, and 39 neutrons, which element do you have? How do you know?

A:

Q: 21.3 gram of salt E(NO)3  are dissolved in 500 ml of solution.The concentration of (NO3-) is 0.6…

A: Given data:

Q: Calculate the mass, in grams, of each sample. a. 1.1 x 10 gold atoms b. 2.82 x 102 helium atoms c.…

A: Calculate the mass in grams of each sample  (a) 1.1 x 1023 gold atoms (b) 2.82 x 1023  helium atoms…

Q: What is the mass of 4.97×1021 platinum atoms?

A: Mass has many units. Its SI unit is Kg. On atomic level, atomic mass unit, molar mass, molecular…

Q: 1)the chemical symbol found on the periodic table is ?  2) the number of protons for the product is…

A: 1.Now we know that the number must be same on both the product as well as the reactant Side and we…

Q: 83 122 Write each isotope symbol Protons Neutrons 31 39 Example Aluminum-27 Protons Neutrons 78 92…

A: We will use number of protons to find atomic number of the element.  No. of Protons = No. of…

Q: 55 3. jA 25 Mn2+ ion has protons, neutrons, and electrons. а) 23; 30; 25 с) 30;B 25; 23 b) 25; 30;…

A: We will identify proton neutron and electron

Q: . Suppose you have a sample of sodium weighing 14.50 g. What mass of potassium would you need to…

A: Atomic mass of sodium=23 Atomic mass of potassium=39 Number of mole=given mass/molar mass So,…

Q: (2.8)An element occurs as three isotopes with atomic masses 19.99 amu (abundance = 90.51%), 20.99…

A: We have to calculate the atomic mass the given element

Q: Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48…

A: Volume of brass 115.5 cm3convert this volume of brass into mass using density(d) = 8.48 g/cm3density…

Q: The mass number of an element is equal toa. the mass of its atom’s protons and neutrons.b. the mass…

A: An atom consists of three sub-atomic particles named electron, proton and neutron. The mass of an…

Q: A hypothetical element, E, has two stable isotopes: E-46-46.046 u 64.08% E-51 = 50.826 u %3D 35-92%…

A: m1 = 46.046 , f1 = 64.08100 = 0.6408 m2 = 50.826 , f2 = 35.92100 = 0.3592 m1 and m2 are the mass if…

Q: In the summer of 2010, platinum (195.078 g/mol) sold for $1,500/oz. One ounce is equal to 28.35 g.…

A: Given: Molar mass of platinum = 195.078 g/mol Cost of platinum            = $1500/oz One ounce…

Q: Iodine has a mass number of 127 and 53 protons, how many neutrons does it have?

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Q: Symbol 35 Cl Protons 26 50 Neutrons 30 66 Electrons 49 86 Mass no. 222 119

A:

Q: How many hydrogen atoms are there in 8.75 g of C,H,NO,? Select one: a. 23 4.79x 10 b. 3.22x 1023 с.…

A: Given: Mass of C2H7NO2 = 8.75 g Molar mass of C2H7NO2 = 77.08 g/mol

Q: Calculate the mass of 5.70×10225.70×1022 tungsten atoms.

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Q: Fluorine 9 F 18.998 Iron 26 Fe 55.845 # Protons: # Electrons: # Neutrons: 10 # Protons: # Electrons:…

A:

Q: 15 Which best describes the atom: 26Fe A. 56 protons, 26 neutrons B. 26 protons, 30 neutrons C. 26…

A: Since you have asked a question with multiple sub-parts, as per our company guidelines we are…

Q: The natural abundance for element "X's" isotopes are: 19.9% 10X (10.013 amu) and 80.1% 11X…

A: Given, an element X and has two natural isotopes with abundance of19.9% of X10(10.013 amu) and 80.1%…

Q: (a) chlorine-35 protons electrons neutrons (b) palladium-104 protons electrons neutrons (c)…

A: Atomic number of a atom is equal to the number of protons present in it. The number of protons are…

Q: Calculate the mass, in grams, of sample.  7.9x10^21 uranium atoms

A: GIVEN: To solve: Mass in grams of uranium atom sample=?

Q: 90) Calculate the mass, in kg, of each sample a) 7.55x1026 cadmium atoms b) 8.15x1027 nickel atoms…

A: Mass of substance is quantity of matter present in substance. Kilogram is unit of mass and denoted…

Q: 13) How many neutrons are in carbon-12 ? A) 7 B) 8 C) 6 14) Identify the chalcogen that has 18…

A:

Q: (IMPORTANT NOTE: X= Symbol, A=mass number, Z = atomic number) Name # of # of protons neutrons Cobalt…

A: Since you have asked multipart type questions, we will solve only first  three questions for you. If…

Q: A certain element XX has four isotopes. 5.845% of XX has a mass of 53.93961amuamu.…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: 57 58 La Ce Lanthanum 138.90047 Cerlum 140.11 Ptable 90 89 Ac Actinium (227) .com Th Therum 21203M…

A: Atomic mass of Pd is 106.42u and atomic mass of Cd is 112.411u  Ag has atomic mass of 107.86 u…

Q: Element "X" has a mass# of 53. How many neutrons does it have if its atomic# is 27

A: According to the answering guidelines, I'm posting the solution for the first question. Kindly post…

Q: If the density of indium is 7.31 g/cm², how many atoms are there in a indium piece of 30 dm wide, 5…

A:

Q: Determine the number of protons and neutrons in 55/26  Fe   Number of Protons  Number of Neutrons…

A:

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46TI…

A:

Q: Naturally occurring lithium is a mixture of 92.58% Li@7 with a mass of 7.016 amu and 7.42% Li@6 with…

A: Given - Sufficiency  of  Li-7  = 92.58% isotope  with mass =7.016 amu sufficiency  of  Li-6  isotope…

Q: Atomic o Mass Number of Name uon lo Symbol Number Neutrons W. Number 8. 2raon ls. 1sd: bozogorq 10 6…

A: Atomic number of an atom is equal to the number of protons present in it. It is written in the…

Q: Abundance = 74.200%, Mass(u) = 45.95263 Abundance = 14.500%, Mass = 47.94795 Abundance =…

A: The atoms of same elements having identical atomic number but have different masses are termed as…

Q: 1. Given the data in table shown below, calculate the atomic mass of unknown element X. Then,…

A: The average atomic mass of element is equal to the product of the masses of the isotope and its…

Q: Element Protons Neutrons Mass (atom) Carbon #protons? 12 Beryllium 4 #neutrons? element? 10…

A: For an element, the atomic number, Z, of an element is equal to the number of protons. The atomic…

Q: Natural rubidium has the average mass of 85.4678 u and is composed of isotopes85 Rb (mass = 84.9117…

A: Mass of the Rb = 86.913 amu. Given data: 85.4678 amu is average mass of the Rb Mass of 85Rb =…

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46TI…

A: The data given about the isotopes of the titanium with the natural abundances: The abundance of…

Q: 25. Silicon has 3 natural stable isotopes : 28Si (92.23%), 2°Si (4.67%), and 30Si(3.10%). Calculate…

A: Average atomic  mass is the  total mass of isotopes divided by total percentage availability  .  It…

Q: How many atoms are contained in a titanium sphere having a diameter of 12.0 mm? The density of…

A:

Q:

A:

Q: What is the mass of 4.91×1021 platinum atoms?

A: Given:Number of platinum atoms = 4.91×1021.Molar mass of platinum = 195.084 g/mol.

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.