A brass alloy contains 78.9% copper, Cu, by mass with the remainder of the alloy being zinc, Zn. Determine the number of moles of zinc in 41.0 g of the brass alloy. moles of Zn = ?   Determine the number of atoms of zinc in 41.0 of the brass alloy. atoms of Zn = ?

Q: Sorbose, C6H12O6, is used in making vitamin C. A sorbose sample contains 36.0 g of carbon atoms.…

A: Mass of carbon =36 g  Moles of carbon in sorbose=36 g ×1 mol12.01 g=2.9975 mol Moles of H atom can…

Q: Determine the mass, in grams, of 0.800 moles of Pb (1 mol of Pb has a mass of 207.2 g).

A: Given : Moles of Pb = 0.800 mol And mass of 1 mole of Pb = 207.2 g

Q: A container has 5.80 x 1023 molecules (aka atoms) of bromine gas. Calculate the mass (in g) of…

A: Bromine gas = Br2 Molar mass of Diatomic  Br2 gas = 159.808 g/mol 6.022 x 1023 molecules mass =…

Q: In the formula for sodium phosphate (Na3PO4), how many moles of sodium are represented? How many…

A: In the formula for sodium phosphate (Na3PO4)   3 moles of sodium are represented 1 mole of…

Q: a 2.558 g sample of sodium carbonate hydrate was heated to drive off the water resulting in 0.948 g…

A: The substance which contains water or its constitute element is known as hydrate.

Q: How many atoms are in a 1.22 mole of sodium

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: Complete the following table. Mass of Sample Moles of Sample Molecules in Sample Total Atoms in…

A:

Q: Part II- Moles 3) What is a mole? Describe the mole in terms of atoms, molecules and grams. DiscUss…

A: A mole is defined as 6.02214076 × 1023 of an atom, molecule, ion, or any other chemical unit. 1 mol…

Q: Samples of several compounds were decomposed, and the masses of their constituents elements were…

A:

Q: Consider the compound zinc acetate ZnC2H3O2 1. How many total atoms are in this compound?  2.…

A: Zn[C2H3O2]2 has 1 Zn atom, 4 carbon atoms, 6 hydrogen atoms and 4 oxygen atoms.Total atoms in this…

Q: A sample of propane, C3H8C3H8, contains 16.1 molesmoles of carbon atoms. How many total moles of…

A: Given, the sample of propane (C3H8) contains 16.1 moles of carbon atoms. In propane, the carbon…

Q: A sample of pure carbon disulfide has a mass of 45.05 g. How many molecules of carbon disulfide…

A: Number of mols = weight / molecular weight  Number of molecules  = number of mols × 6.023 × 1023

Q: A chemist decomposes samples of several compounds; the masses of their constituent elements are…

A: The elements present in the compound are given as Be, S and O. Hence we can assume that the…

Q: Determine the number of atoms in 77.0 grams of bromine,  Br ( The mass of one mole of bromine is…

A: Number of moles of a substance is equal to the mass of the substance divided by its molar mass.

Q: Determine the number of atoms in 47.0 grams of vanadium, V. (The mass of one mole of vanadium is…

A: Number of mole(n)= weight(g)/(molar mass in g/mol) weight of Vanadium=47.0 g Atomic mass of…

Q: Calculate the number of nitrogen atoms in a 70.0 g sample of dinitrogen tetroxide (N,0.).

A: Given :- mass of N2O4 = 70.0 g  To calculate :- number of nitrogen atoms

Q: How many particles of Glucose (C6H1206) are in a 0.25g sample. Round periodic table average atomic…

A: Given, Mass of glucose sample = 0.25 g Chemical formula of glucose = C6H12O6 Molecules or particles…

Q: How many moles of carbon are in 7.87×10 carbon atoms?

A: Given, Number of Carbon atoms = 7.87 × 107 atoms moles of Carbon are in 7.87 × 107 Carbon atoms = ?

Q: Barium and nitrogen form two binary compounds containing 90.745% and 93.634% barium, respectively.…

A: The formula of the compound in which the elements are present in the simplest whole number ratio is…

Q: Determine the mass, in grams, of 0.330 moles of Pb (1 mol of Pb has a mass of 207.2 g).

A: The given moles of Pb can be converted to mass by using the formula given below as; Mass = Moles ×…

Q: What quantity in moles of silver atoms do you have if you have 5.99 × 10²¹ atoms of silver. (The…

A:

Q: A compound consists of carbon and hydrogen. The molar mass of this compound is 44.1 g/mol. The…

A: Molecular formula of any compound can be determined by knowing the number of moles of each element…

Q: 4. Complete the following table Mass Moles Particles 3.65 moles Mg 29.54 g Cr 3.54 x 1025 atoms P…

A: Mass = Molar mass * Moles The no of particles in 1 mole = 6.023*1023

Q: Convert between moles and numbers of atoms. A sample of lithium contains 2.24x1025 Li atoms. What…

A:

Q: A sample of propane, C3 H3, contains 13.1 moles of carbon atoms. How many total moles of atoms does…

A:

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17H22CINO4, of mass 23.5 mg.

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: Determine the number of atoms in 81.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Atomic weight of any element contains contain Avogadro number of atoms. Here mass of 1 mole of…

Q: Magnesium oxide contains 60.3 % magnesium by mass. Calculate the mass of magnesium oxide sample if…

A: Given,Mass percent of magnesium in magnesium oxide = 60.3%.Mass of magnesium in sample = 20.5g.

Q: c- The formula for water is contains .. (... x1+...X 16 =....) D- the combustion of fuels is…

A: Water is a compound and is made of Hydrogen and oxygen. Chemical reactions are of various types-…

Q: Calculate the number of atoms in a 9.06×1039.06×103 g sample of strontium.

A: Calculate mole= mass/molar mass  Then atoms=mole×avagadro number

Q: Determine the mass, in grams, of 0.145 moles of Pb (1 mol of Pb has a mass of 207.2 g).Determine the…

A: Given: Moles of Pb = 0.145 mol Molar mass of Pb = 207.2 g/mol Mass of Na = 61.0 g Molar mass of Na =…

Q: A sample of ammonia(NH3 17.03 g/mol) has a mass of 56.6 g. How many molecules are in this sample (1…

A: mol designates 6.022 * 10 raise to power 23 molecules.

Q: Determine the number of atoms in 15.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: one mole of any species contains one avagadro number of atoms

Q: You have a 20.0 g sample of silver metal. You are given 10.0 g of another metal and told that this…

A: The situation is possible or not has to be determined.

Q: How many moles of Pb are in 4.71 x 1021 Pb atoms? O 2.84 x 1045 6.022 x 1023 207.2 none of the above…

A:

Q: calculate the mass of 600. atoms of nitrogen

A: The molar mass of any substance is the mass of 1 mole of that substance. The unit of molar mass is…

Q: Determine the number of atoms in 35.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: 1 mole of a substance contain Avogadro's number of atoms . 1 mole of substance = gram atomic mass…

Q: Determine the number of atoms in 61.0 grams of bromine, Br. (The mass of one mole of bromine is…

A:

Q: Determine the mass, in grams, of 0.670 moles of Pb (1 mol of Pb has a mass of 207.2 g).

A: A chemical reaction is symbolic representation of the conversion of substances to new substances. In…

Q: Calculate the number of atoms in a 9.03×103 g sample of sodium.

A:

Q: What quantity in moles of silver atoms do you have if you have 5.09 × 10²¹ atoms of silver. (The…

A: 1 mole = 6.021 x 1023 atoms. The mass of one mole of silver is 107.87 g.

Q: Two binary oxides of the element manganese contain, respectively, 30.40% and 36.81% oxygen by mass.…

A: Empirical formula refers to the formula of a compound in which the elements are present in the…

Q: 1.Calculate the mass of the following numbers of atoms =(3.01 = 10^21)atoms of cobalt

A: The question  is based on the mole concept. one mole of a compound contains avogadro number of…

Q: Calculate the mass in grams of 15 atoms C

A: Mole is defined as    Interms of particles :  1 mole = 6.022 x 1023 atoms  Interms of mass :  1…

Q: Determine the number of atoms in 33.0 grams of vanadium, V. (The mass of one mole of vanadium is…

A: Given is,  Mass of vanadium = 33.0 g Molar mass of Vanadium = 50.94 g/mol

Q: A metal alloy containing 67% (by mass) lead and having a density of 9.4 g/cm3 . If the second metal…

A: Given Information -  mass % of lead,Pb= 67%  mass % of tin = 100% - 67% = 33%  mass of lead = 67 g…

Q: Determine the number of atoms in 23.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Mass of Ca = 23 g  Molar mass of Ca = 40.08 g/mol

Q: Determine the number of atoms in 53.0 grams of bromine, Br. (The mass of one mole of bromine is…

A:

Q: Calculate the mass of 400. atoms of sulfur (S)

A: Given: Number of atoms of S = 400 atoms.

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.