An atom consists of two isotopes, the first with an atomic mass of 15.8967 amu and the second with an atomic mass of 16.8245 amu.  If the average mass is 16.2191 amu, what is the % abundance of first isotope?

Q: What is the mass of 3.01 x 1023 atoms of FeO? Round to two decimal places.

A: a) Given  mass of AgNO3 = 5,398 grams  molar mass of AgNO3 = 169.87 g/mol Conversion factor - 1 mol…

Q: A mass of 145 g of a certain element is known to contain approximately 3.64 x1024 atoms. What is the…

A: Let the molecular weight of the element is M gm/mol.  Moles = weight/mol. wt.  Or, moles = 145/M  We…

Q: What is the mass grams that are in 6.70 x 1025 molecules of 1,?

A:

Q: the atomic masses of 10B and 11 B are 10.012938 and 11.009305 amu, respectfully. The average atomic…

A:

Q: Calculate the mass CARBON in 0.0299 moles of C6H12O6.

A: A pure compound is that which contains its constituent atoms in fixed ratio by mass.C6H12O6  is a…

Q: 4. What is the mass of 7.75 moles of magnesium metal?

A:

Q: The ratio of the mass of O to the mass of N in N20z is 12:7. An- other binary compound of nitrogen…

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: There are 6.02x1023 atoms in one mole of any element. Assuming that the titanium rod in the question…

A: Given that, Number of moles of titanium = 4.70 moles

Q: How many B atoms are there in 5.1 mols of B? Please give your answer in terms of scientific notation…

A: Solution The mole thought may be a convenient technique of expressing the number of a substance. Any…

Q: If you have 13.02 x1023 atoms of nitrogen, what would you expect its mass to be?

A: Given, Number of Nitrogen atoms = 13.02 X 1023

Q: On a periodic chart of the elements, molar mass (M), also called atomic weight, is often listed as…

A: A chemical compound consists of two or more different elements which are bonded with each other…

Q: The molecular formula for benzene is C6H6. What is its empirical formula?

A: We have to predict the empirical formula of benzene.

Q: Calculate the mass of 3.01 x 1025 atoms of terbium whose molar mass is 158.9 g/mol.

A: Given that, Mass of atoms=Calculate the mass of 3.01 x 1025 Molar mass of terbium= 158.9 g/mol.

Q: What is the mass, in grams, of each of the following samples? a.) 2.75 mol of iron, Fe  b.) 0.115…

A: Mole of solid sample is calculated by below formula,

Q: What is the mass in grams of 5.56 x 1023 atoms of arsenic (As) ?

A: 1 mole of As is having atomic mass                                           = 74.9216 g 1 mole is…

Q: Calculate the mass, in grams, of 532.0 atoms of cadmium, Cd (1 mol of Cd has a mass of 112.41 g).

A: We know that, 1.0 mol of any substance = 6.022 × 1023 atoms of that substance.

Q: What is the mass in grams of 6.022 * 1023 N atoms of mass 14.01 amu?

A: To determine the mass in grams of 6.022x1023 N atoms of mass 14.01 amu Given that: Mass of each atom…

Q: What percentage of the mass of a phosphorus 32 atom is contributed by its electrons, given the mass…

A: Phosphorus-32 has 15 electrons. Mass of electrons in Phosphorus-32 can be calculated as follows,…

Q: Polyisobutylene is a synthetic elastomer, or rubber. The corresponding monomer is isobutylene, which…

A: Given, molecular formula C4H8

Q: A substance is 77.5% Pb, 4.5% C, and 18.0% O. How many atoms of carbon are there for each atom  of…

A:

Q: 9.21 x10^19 molecules of hydrogen gas,(H2) are equal to how many grams of hydrogen gas?

A: Number of molecules = 9.21 × 1019 molecules Avogadro’s constant = 6.022 × 1023 molecules Numbre of…

Q: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

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Q: Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 41.0% of the lighter…

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

Q: What is the mass of 6.02 x 1023 atoms of carbon, C?

A: Concept is based on mole concept

Q: Calculate the mass, in grams, of 162 atoms of potassium, K (1 mol of K has a mass of 39.10 g).

A: Avogadro number determines the number of atoms in one mole of a substance. Its value is 6.022×1023…

Q: What mass of ethanol (C2H6O) would contain 7.0 x 1026 atoms of carbon?

A:

Q: What is the mass of a mole of electrons if one electronhas a mass of 9.11 × 1 0 -28 g?

A: Because, 1 mole=6.022×1023 molecules/particles Therefore, 1 mole of electron=6.022×1023 electrons

Q: How many grams of sugar C12H22O11 that consists of 1.25 x 1024 atoms of hydrogens?

A: Given that ; We have to determine the mass of sugar (in g) that consists of 1.25 x 1024 atoms of…

Q: Which of the following statements is/are TRUE regarding paracetamol, C8H9NO2? Select one or more:…

A:

Q: Matter is neither created nor destroyed in a chemical reaction. Thus, the mass of the products of a…

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Q: How many moles would 1.00 x 10^23 molecules of methane(CH4) represent

A: Given  Number of molecule of CH4  = 1 × 1023 molecule  Number of mole = ?

Q: What is the mass, in grams, of Vitamin C (C6H8O6) that contains 1.076 grams of carbon?

A: Molar mass of C = 12.01 g/mol mass(C)= 1.076 g number of mol of C, n = mass of C/molar mass of C…

Q: What is the mass of 5.83 ×1017 molecules of liquid propane, C3H8?

A: Given, Number of molecules of C3H8 = 5.83 x 1017  Molar mass of C3H8 = 44.1 g/mol First, we find the…

Q: 23 atoms of magnesium? 1. How many moles of magnesium is 5.61 x 10

A: moles of any species is defined as when given mass of species divided by its molar mass

Q: How many atoms of carbon are combined with 7.31 moles of hydrogen atoms in a sample of the compound…

A: Given : number of moles of hydrogen atoms in a sample of heptane = 7.31 mol  To calculate : number…

Q: The average atomic mass of carbon is 12.011 amu. Assuming you were able to pick up only one carbon…

A: Given that, the average mass of carbon is 12.011 a.m.u. The given mass of any of the carbon isotopes…

Q: The molar mass of platinum is 195.08 g/mol. What is the mass of 1.00 × 102 Pt atoms?

A: Given information: Molar mass of Pt = 195.08 g/mol Atoms of platinum = 1.00 × 102

Q: A carbon- hydrogen-nitrogen compound has a molar mass of 114.20 g/mol and it has the following…

A: Empirical formula of a compound may be defined as the formula which gives simplest whole number…

Q: How many moles of neon would there be in 7.59 x 1025 neon atoms?

A: Avogadro's number (N) = 6.022 x 1023 atoms/mole No of moles = No of atoms / N                    =…

Q: 9. If you have 9.407 x 1023 atoms of lead, how many grams of lead (IV) phosphate can you make? 10.…

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Q: 7. What is the mass in grams, of Vitamin C (C6H8O6) that contains 1.076 grams of carbon?

A: Given mass of Carbon = 1.076 g Molar mass of Carbon = 12.01 g/mol Molar mass of C6H8O6 = 176.12…

Q: 127: An iron ore contains 38% Fe203 by mass. What is the maximum mass of iron that can be recovered…

A: 127. Given information, An iron re contains 38% Fe2O3 by mass Mass of iron ore = 10.0 kg

Q: Potassium's atomic number is 19 and its atomic weight is 39.1, so its molar mass is:

A: The atomic number of an element refers to the number of protons in an atom, and the atomic mass is…

Q: How many moles and atoms of 40K are there in 3.29g 40K?

A: The mass of 40K is = 3.29 g The molar mass of 40K = 39.964 g/mol Moles of 40K is =? The number of…

Q: What is the average atomic mass of a mystery substance that is 27.5 at a mass of 37g and 72.5% at a…

A: Given: Mass =37 g  Percentage %=27.5 % Mass =38 Percentage % =72.5% Average mass=?

Q: The Avogadro number is defined as A The number of electron in 12g of C-12 substance B The number of…

A: The question is based on the concept of avogadro  number. we have to correctly identify the…

Q: How many moles would 1.00 x 103 molecules of methane ( 1. CH4) represent?

A: Avogadro number (NA) 1 mole of a substance contains 6.02×1023 molecules 1 mole of O2 contains…

Q: Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of…

A: Isotopes are elements with the same number of protons but differ in the number of neutrons. The…

Q: Boron trifluoride is used as a catalyst in the synthesis of or-ganic compounds. When this compound…

A: When the compound involves boron-11 and fluorine-19 isotope, the molecular mass of the compound is;…

Q: How many moles of gold are 8.5 x 1024 atoms of gold?

A:

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.