1.An isotope of a neutral element has 24 electrons and 31 neutrons. What is the element? Cr Cs Cl Ga 2.An element A forms an ionic compound with chloride having the formula ACl2. If the ion of element A has 18 electrons what is the identity of element A? Ca K Ar Ti

Q: 2. Nitrogen is made up of two isotopes, N-14 and N-15. Given nitrogen's atomic weight of 14.007,…

A: Given,  Average atomic weight of N = 14.007  Mass of N-14 isotope = 14.003074 g/mole  Mass of N-15…

Q: The element antimony exists in nature as two isotopes: 121Sb has a mass of 120.9038 u and 123Sb has…

A: The average atomic mass of Sb = 121.76 u.Mass of 121Sb = 120.9038 u.Mass of 123Sb = 122.9042 u.Let…

Q: 32. Americium­241 is used in household smoke detectors. This element has 11 known isotopes, none of…

A: Given  Atom = Americium - 241  Number of proton , neutron , electron = ?

Q: Silicon has three stable isc mu). The ratio of the abund maturally occurring sample- erage atomic…

A: The objective of the question is to determine the average atomic mass that emerges when all the…

Q: Cerium has four stable naturally occurring isotopes which are listed in the table with their…

A:

Q: The radius of a rhodium atom is 134 pm. How many rhodium atoms would have to be laid side by side to…

A: GivenRadius of rhodium = 134pm Distance= 1.70mmMass of single uranium atom = 4.70×10^-22g

Q: Tur Enter numeric value al used in the filaments of incandescent light bulbs. Naturally occurring…

A:

Q: 5. Calculate the average atomic mass of Nitrogen (verify in the periodic table) 14N 14.003 u 99.6%…

A: Given,  14N      14.003 u         99.6% 15N      15.000 u          0.4%

Q: 1. Lithium occurs in nature as a mixture of two isotopes: Li, which has an atomic mass of 6.015 amu,…

A: Given;

Q: bottle. The bottle contains 3.78 L of ethanol. The bottle contains 2 What is the density of ethanol…

A:

Q: On a planet in another galaxy, tellurium exists as only two isotopes, Te123 and Te130. The masses…

A: The average atomic mass of element can be calculated by adding the masses of the isotopes each…

Q: a. Using the average atomic mass of carbon, calculate the mass (in amu) of 137 carbon atoms. amu b.…

A: Answering only the first 3 subparts as per guidelines for further assistance please post the…

Q: a. For the negative ion Br, use the concept that a chemical compound must have a net charge of zero…

A:

Q: The element X has isotopes. The masses (atomic mass unit) and % abundances of the isotopes are given…

A:

Q: An element has three isotopes, A, B, and C. Percent abundance of the isotopes A and C are 60 % and…

A: The percent natural abundance of isotope A is 60%. The percent natural abundance of isotope C is…

Q: a. For the positive ion Rb+, use the concept that a chemical compound must have a net charge of zero…

A:

Q: D Suppose that fictional element X has an average atomic mass of 74.029 u. Element X has two…

A: Given -> Average atomic mass = 74.029 u Isotope -1 has mass(m1) = 72.021 u Isotope -1 has…

Q: a. For the positive ion Rb+, use the concept that a chemical compound must have a net charge of zero…

A: we have to determine the formula of the ionic compounds formed when the given ions react

Q: The ratio of the mass of O to the mass of N in N2O3 is 12:7. Another binary compound of nitrogen has…

A: The given ratio of mass O to the mass of N in N2O3 is 12:7 Mass of O in N2O3 = 3x16 amu…

Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope 46 Ti 48 Ti…

A:

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: The element chlorine has two naturally occurring isotopes. The isotopic masses and abundances of…

A: Recall the following expression to calculate average atomic mass of chlorine average atomic…

Q: . A solution in prepared by dissolving 14.36 g of CaCl₂ in 727 mL of water. The total mass of the…

A: Given: The mass of CaCl2 dissolved in 727 mL of water = 14.36 g The total mass of the solution =…

Q: 6. The element magnesium has three naturally isotopes. Given the following information calculate the…

A: Certain metal in period table have more than 1 isotope with different relative abundance  Here We…

Q: A generic element, G, is composed of two isotopes, ¹32G and 128G. 132G has a natural abundance of…

A:

Q: An element has three isotopes, A, B, and C. Atomic masses and percent abundances of the three…

A: The concept is to calculate the average atomic mass of an element.The elements having same atomic…

Q: a. An element (X) is found in the (4th row & 6th group) of the periodic table. Write the symbol of…

A: We have to find the element X in given questions

Q: 5. A sample of Magnesium contains three isotopes and its average atomic weight is 24.35 amu. If the…

A:

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

A:

Q: 17.A hypothetical element X is found to have an atomic mass of 37.45 amu. Element X has 2 isotopes,…

A: Given that mass of X-37 = 37.24   Let x be the mass of the other isotope  Fractional abundance of…

Q: 2. Calculate the average atomic mass of Element Sh. Sh has three isotopes: 39Sh, 40Sh, and 41Sh.…

A:

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: The element indium has two naturally occurring isotopes: 113In and 1 In. The 113In isotope has a…

A: Correct option A. Indium is non metal is incorrect. Indium is a metal with soft,melable,ductile…

Q: 9. Lithium hydroxide crystals are used in manned space vehicles to remove carbon dioxide gas from…

A:

Q: The ratio of the mass of O to the mass of N in N2O3 is 12:7. Another binary compound of nitrogen has…

A: Step 1        N2O3Mass of Oxygen in N2O3 = 16x3 =48gMass of Nitrogen in N2O3 = 14x2 = 28gMass of…

Q: An unknown element X forms a compound with chlorine: XCl2. Predict the chemical formula of the…

A: The information given is An unknown element X forms a compound with chlorine: XCl2. The chemical…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.