An element's most stable ion forms an ionic compound with bromine, having the formula XBr3. If the ion of element X has a mass number of 225 and has 86 electrons, what is the identity of the element, and how many neutrons does it have?

Q: Carbon tetrachloride has a chlorine-to-carbon mass ratio of 11.8:1 If a sample of carbon…

A: CCl4 is carbon tetrachloride. Mass ratio of Cl:C is 11.8:1  It means 11.8 g Cl per 1 g C

Q: An element's most stable ion has a 2+ charge. If the ion of element  has a mass number of 230 and…

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Q: Ammonia is a gas with a characteristic pungent odor. It is sold as a water solution used in…

A: The atomic mass of N relative to H in a sample of of ammonia contains 7.933 g N and 1.712 g H, it is…

Q: In a naturally occurring sample, 19.8% of boron atoms have five neutrons and 80.2% have six…

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Q: A certain ion X-1 contains 18 electrons and 17 neutrons. Identify the element X. What is the mass…

A: Given information: Number of electrons and neutrons in  X-1 = 18 electrons and 17 neutrons

Q: The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride…

A: After the decomposition of sodium fluoride, the mass of fluorine produced is calculated by using the…

Q: Suppose that atomic masses were based on the assignment of a mass of 12.000 g to 1 mol of carbon,…

A: SOLUTION: Step 1: One Dalton is defined as one-twelfth the mass of one mole of carbon-12 isotopes.…

Q: Which subatomic particle(s) are found in the nucleus of the atom? Enter the subatomic particle or…

A: To find : Which subatomic particles are found in the nucleus of the atom.

Q: Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 58.3% of…

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Q: Cerium is the most abundant rare earth metal. Pure cerium ignites when scratched by even a soft…

A: The Isotopes given are Ce-136(atomic mass=135.907 amu), Ce-138(atomic mass=137.905 amu),…

Q: In an experiment, the reaction of 100.0 g of iodine produced 144.9 g of a compound formed from…

A: It is an example of law of conservation of mass

Q: Bromine has an average atomic mass of 79.904 amu. If Br-79 has a mass of 78.92 amu and Br-81 has a…

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Q: Consider a hypothetical case in which the charge on a proton is twice that of an electron. Using…

A: We need to consider the hypothetical case where the charge on the proton is twice than that of an…

Q: Copper has 2 stable isotopes, namely Cu-63 and Cu-65. The atomic masses of the said isotopes are…

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Q: Consider a hypothetical case in which the charge on a proton is twice that of an electron. Using…

A: The atomic number of potassium (K) is 19. The mass number of potassium is 39. The number of protons…

Q: The atomic masses of 10B and 11B are 10.0129 amu and 11.0093 amu, respectively. Calculate the…

A: The atomic masses of B10 and B11 are 10.0129 and 11.0093 respectivelyLet their natural abundances be…

Q: Potassium has three isotopes with masses 38.9367 amu, 39.9640 amu, and 40.9618 amu. The abundance of…

A: Abundance of other two isotopes can be calculated as:-

Q: A hypothetical element exists as two isotopes: I = 92.00 amu and II = 98.00 amu. If the atomic mass…

A: Suppose fraction of isotope I = A Fraction of isotope II = (1 - A) Atomic mass = A x atomic mass of…

Q: Identify the missing information for each atom or ion. Note that the atoms and ions are not…

A: The mass number of any element is determined by the count of neutrons and protons making an atom of…

Q: An ion of platinum has a mass number of 195 and contains 74 electrons. How many protons and neutrons…

A: Given data: The mass number of platinum ion=195 Number of electrons present in platinum ion=74 To…

Q: 1) There are 10 Protons in a neutral atom and it is a gas at room temperature and how many neutrons…

A: For an atom, protons are equal to the number of electrons and atomic number.  Proton=electrons =…

Q: Write the appropriate symbol (including mass number) for each atom or ion: 1)  Z= 16, number of…

A: mass numbe (A)=  number of protons + number of neutrons  atomic number  (z)= number of protons  The…

Q: A new transition metal, bartium, has been discovered, which is represented by the chemical symbol…

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Q: An element has several isotopes. The mass number of one of its isotopes is 65 and it has 36 neutrons…

A: The number of protons (P) in the nucleus of the given isotopes is; mass number=n+PP=65-36P=29

Q: The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of…

A: Atomic species that have the same atomic number but different mass numbers are called isotopes.  An…

Q: An atom of chlorine (CI) has a mass number of 37. Given only this information, which of the…

A: Given that atomic mass of chlorine = 37  Atomic number of chlorine = 17  Atomic number of neutral…

Q: Ammonia is a gas with a characteristic pungent odor. It is sold as a water solution for use in…

A: Mole Moles is a quantity that represents a collection of 6.022×1023 atoms or molecules. The…

Q: Antimony has two naturally occurring isotopes: 121Sb (isotopic mass 120.904 amu) and 123Sb (isotopic…

A: If A1 and A2 atomic masses of two isotopes of an element with X1 and X2 as their percentage…

Q: Calculate the number of protons, neutrons, and electrons in 15 g of Si-28. The isotope Si-28 has a…

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Q: A hypothetical element, M, has four stable isotopes with the masses shown below. 109M = 108.9842…

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Q: How many electrons are in the ion?   What is the name of the element?

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Q: An element X has two common isotopes: X-57 and X-59. If the average atomic mass of element X is…

A: An element has two isotopes : X-57 and X-59 Average Atomic mass = 58.876 amu

Q: A monoatomic ion has a charge of 1+.   This ion has 18 electrons and 20 neutrons.     How many…

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