Determine the number of atoms in 61.0 grams of bromine, Br. (The mass of one mole of bromine is 79.90 g.)

Q: A sample of monochloro pentaborane (9), B5H8Cl, has a mass of 20.7 g. What amount, in moles, does…

A: Chemical formula of monochloro pentaborane = B5H8Cl.Above compound contains B, H and Cl atom.

Q: Lithium forms compounds which are used in dry cells and storage batteries and in high-temperature…

A: The variants of any element containing dissimilar neutrons number but similar protons number (atomic…

Q: Determine the mass in grams of 5.90 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is…

A: Given that:  Atoms of arsenic = 5.90×1021 Mass of arsenic = 74.92g  1mole = 6.023×1023 atoms

Q: The atomic weight of bromine is 79.904, yet no atom of bromine weighs 79.904 amu. Why is this true?

A: Given : The atomic weight of bromine is 79.904, yet no atom of bromine weighs 79.904 amu.

Q: How many carbon atoms are there in a diamond (pure carbon) with a mass of 52 mg?

A: The number of carbon atoms can be calculated as follows,

Q: How many moles of calcium atoms do you have if you have 2.85 x 1021 atoms of calcium. (The mass of…

A: The Answer to the following Question is given as:

Q: The empirical formula of propylene is CH2. An experimental determination of the molar mass of…

A: Let the number of carbon atoms be n and the number of hydrogen atoms be 2n in the molecular formula…

Q: Stony meteorites are made up of minerals that contain silicates, which are materials made of silicon…

A:

Q: Determine the number of atoms in 67.0 grams of sulfur, S. (The mass of one mole of sulfur is 32.07…

A: Given  Mass of Sulfur  = 67 gram  Molar mass of Sulfur = 32.07 gram/mole Number of atom = ?

Q: A newly discovered element, X, has 3 isotopes weighing 350 amu, 355 amu, and 357 amu. If the…

A: Given:3 isotopes of X weighs 350 amu, 355 amu, and 357 amuAbundances of these isotopes are 50.0 %,…

Q: Determine the mass in grams of 5.51 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is…

A:

Q: Determine the number of atoms in 25.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Given, the mass of one mole of sodium is 22.99 gwe are asked to calculate the number of atoms in…

Q: In 100.5 g of water (H2O), how many total atoms are there?

A: Number of atoms in a molecule = Atomicity of molecule x no. of moleculeNumber of molecule = no. of…

Q: Determine the mass in grams of 7.21 × 10²¹ atoms of carbon. (The mass of one mole of carbon is 12.01…

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

Q: What quantity in moles of potassium atoms do you have if you have 3.50 x 1024 atoms of potassium.…

A:

Q: Determine the mass in grams of 3.00 x 1021 atoms of arsenic. (The mass of one mole of arsenic is…

A: Given : number of arsenic atoms = 3.00 X 1021 atoms  mass of 1 mole of arsenic = 74.92 g

Q: A chemist has one mole of an unknown molecule. The mass of this sample is 184.1 grams. After doing…

A: Given: Mass of 1 mole of molecule = 184.1 g. And the molecule has the formula XBr2.

Q: Determine the mass in grams of 7.98 × 10²¹ atoms of carbon. (The mass of one mole of carbon is 12.01…

A:

Q: Determine the mass in grams of 7.06 × 10²¹ atoms of barium. (The mass of one mole of barium is…

A:

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: Determine the mass in grams of 7.75 x 1021 atoms of carbon. (The mass of one mole of carbon is 12.01…

A: Given,the mass of one mole of carbon = 12.01 gNumber of carbon atoms = 7.75×1021 atomsHere, we are…

Q: Bromine and chlorine react to form simple diatomic molecules in a 1:1 ratio, BrCl. The natural…

A: The least common form of BrCl is the molecule that is made from each of the Br and Cl atoms…

Q: A pure copper sphere has a radius of 0.935 in. How many copper atoms does it contain? [The volume of…

A: First convert the given radius in inch to cm. 1 inch = 2.54 cm, then

Q: The mass of a copper coin is 7.83 g. Suppose it were pure copper. a) How many moles of Cu atoms…

A: a) Given that : Mass of Copper coin = 7.83 g Molar mass of copper = 63.55 g/mol Moles of copper atom…

Q: 1) What is the mass in grams of 6.86x10^23 atoms of manganese? 2)How many manganese atoms are there…

A: 1)  Number of moles of manganese = number of atoms (given) / number of atoms in 1 mole number of…

Q: The stable isotopes of iron are $4Fe, Fe, $7Fe, and 5"Fe. The mass spectrum of iron looks like the…

A: The given mass spectra of iron is, The relative number of isotope atoms of 54Fe is 5.85. The…

Q: Lithium forms compounds which are used in dry cells, storage batteries, and in high-temperature…

A: Given : Atomic mass of Li = 6.9412 amu Isotopic mass of 6Li isotope = 6.015123 amu  And Isotopic…

Q: Determine the number of atoms in 41.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Given: Mass of sodium 41.0 g            Mass of one mole of sodium is 22.99 g/mol First divide the…

Q: What quantity in moles of potassium atoms do you have if you have 3.50 x 1022 atoms of potassium.…

A:

Q: 1. A sample of acetic acid has 5.82x10^25 molecules. How many grams of oxygen are present?

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: How many grams of rubidium are in 3.49 x 1024 atoms of rubidium? Enter your answer in decimal form…

A: 1 mole atoms = 6.023 * 1023 atoms. molar mass of Rb = 85.4678 gmole  and mass of Rb = mole * molar…

Q: A 12.6712.67 g sample of NaBr contains 22.3422.34% Na by mass. Considering the law of constant…

A: Given: % Na = 22.34 % = 22.34 g Na/ 100 g NaBr Mass of NaBr = 6.63 To find : grams of sodium =?

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: Variations in average atomic mass may be observed for elements obtained from different sources.…

A:

Q: Determine the mass in grams of 3.60 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is…

A: Solution In chemistry, the molar mass of a matter is outlined because the mass of a sample of that…

Q: Gallium Arsenide has a density of 5.32g/cm3 and the chemical formula GaAs. A GaAs piece has a volume…

A:

Q: Determine the number of ethylene molecules, C 2 H 4 , in a 7.3 g sample of ethylene, [ans: 1.6 X 10…

A:

Q: Determine the mass in grams of 7.45 × 10²¹ atoms of barium. (The mass of one mole of barium is…

A: Given, Number of atoms of Barium = 7.45 × 10²¹ The mass of one mole of barium is 137.33 g

Q: Determine the mass in grams of 5.47 × 10²¹ atoms of barium. (The mass of one mole of barium is…

A: Molar mass of any element is the mass of Avogadro number of atoms. That is the weight of 6.022 × 10…

Q: 2.) How many atoms are there in 189 grams of KCI?

A: Answer: To find out the number of atoms in the given sample of KCl we need to convert this mass into…

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: What quantity in moles of sodium atoms do you have if you have 2.10 × 10²³ atoms of sodium. (The…

A: The objective of the question is to find out the quantity in moles of sodium atoms given the number…

Q: A gold ring is composed of 2.65 × 1023 atoms. Calculate the mass of the ring in grams. mass:

A: Given data :number of atoms in copper ring = 2.65 x 10^23 Solution :atomic mass of Cu = 63.5…

Q: Determine the mass in grams of 8.16 x 10^21 atoms of zinc. (The mass of one mole of zinc is 65.39 g

A: To determine the mass in grams of atoms of zinc, we can use the following steps:Find the molar mass…

Q: calculate the mass of fluorine

A: Mass percentage = (mass of a component in a mixture/total mass of mixture) × 100%

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.