What is the average mass (in amu) of:a. Hg b. Kr c. Mg

Q: 38. Calculate the number of grams in each of the following a. 1.29 moles of cobalt(II) chloride b.…

A: Number of grams = Number of moles × Molar mass

Q: The empirical formula of a group of elements is:      a. The simplest whole number ratio of atoms…

A: Empirical formula of any compound is defined as the simplest whole number ratio of atoms present in…

Q: 3. 75 ml CCl, (liquid) Calculate n (mol CCI4)

A: Given data : Volume of CCl4 = 75 mL Also density of CCl4 = 1.59 g/mL So, mass of CCl4 = Volume x…

Q: 40.749 1.SIX 26.98zytmot x 10- moles of leacl %3D c.8.75 28.75x10 mot ¥207.299/mor Imass 18.13g…

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Q: 12. It contains the greatest number of atoms. A. 4.0 mol NH3 B. 6.0 moles CO C. 3.0 moles SO3 D.…

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Q: 20. Determine the molar mass of NH3 and H2O. Then determine the number of moles of H2O in 6.01grams.…

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Q: The moler mass of sulfur tetrafluoride is A. 54.10 g\mol B. 358.60 g/mol C. 108.07 g/mol D.…

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Q: a. Calculate the number of molecules present in 2.70 g of C6H12O6. molecules b. Calculate the number…

A: Mole is equal to weight of substance divide by it's molar mass

Q: A student in lab needs to make a solution that is 6.00% by mass NaCl. If 175 g of NaCl is available,…

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Q: A. How many moles of dioxygen difluoride, O2F2 , are present in a sample that contains 3.41 moles of…

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Q: What are the values for % Cl and % F, respectively, for Sample II?A. 0.622 and 61.65 C. 38.35 and…

A: Mass percent of a compound is equal to the mass of component divided by the total mass of all the…

Q: ✓ 3.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to…

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Q: What is the empirical formula for the compound formed in previous problem?   Cr I Mass of element…

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Q: How many moles of sulfate ions (SO,2) are present in 0.30 mol of aluminum sulfate? A. 0.10 mol B.…

A: Al2(SO4)3 is a salt and readily dissociates in water forming following ions as shown below in the…

Q: The % sulfur in sulfur dioxide is

A: The atomic mass of Sulfur =32 g The atomic mass of Oxygen =16 g So, the mass of compound SO2=32+16×2…

Q: 2. Calculate the number of moles in each of the following a. 123.5 g of KCIO b. 17.3 g of H, c. 11.6…

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Q: how many moles of hydrogen gas is generated per mole of zinc that reacts with hydrochloric acid? A.…

A: When Zn is reaction with HCl it will release 1 mole of hydrogen  Zn is highly reactive than hydrogen…

Q: What is the molar mass of NaC4H3O? A. 80 g/mol B. 90 g/mol C. 70 g/mol D.100 g/mol

A: To solve this problem we have to calculate the molar mass of given compound.

Q: How many moles of sulfate ions are contained in 0.420 moles of aluminum sulfate?   A. 0.140 moles…

A: Only 1st question is answered according to the policy

Q: How many moles are in 18.5 g lead?

A: No of moles = WEIGHT /MOLECULAR WEIGHT  n=W/M

Q: Which of the following compounds contains the largest number of atoms?

A: 1 mol = 6.022 × 1023  atoms   We can calculate moles of each atom in a mole of compound. For example…

Q: What is the elements, atomic mass, number of atoms, subtotal and composition? 1. Compound:…

A: Following are the detailed calculation of elements, atomic mass ,no. of atoms ,subtotal and % of…

Q: Propane gas, CHs, is the fuel source for gas grills and fire places. What is the molar mass of…

A: Introduction: The number of moles in any given sample can be estimated if the total mass of the…

Q: 1. Convert the following quantities into moles a. 1000.0 g Mg b. 1000.0 g H₂O c. 1000.0 g NaCl

A: Since you have posted multiple questions with multiple sub-parts, we will provide the solution only…

Q: What is the empirical formula of an compound containing 81.8% C; 18.2% H.   C H Mass of element (in…

A: The question is based on the concept of elemental analysis. based on the data provided, we have to…

Q: 24.3 g He = ____________ mol He

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

Q: How many oxygen atoms are present in 2.1g of Al203? Molecular weight of Al203= 102 g/mol Avogadrow…

A: The number of atoms in oxygen molecule has to be given, Given, Mass=2.1 g. Molar mass=102 g/mol.…

Q: Which one of the following samples contains the largest number of molecules? a. 3 moles of H2O b.…

A: 1 mole = 6.022×1023 [Avogadro's number ] The mass of one mole of molecules of a substance is known…

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.