21. Using Example 2.11 page 64 of your textbook to obtain the mass % of chlorine (Cl) in CH2Cl2 and CHC3.

Q: A.How many moles of boron trichloride are present in 1.03 x 10^23 molecules of this compound? B.How…

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

Q: a. How many moles of sulfur hexafluoride, SF6, are present in 1.87 grams of this compound? moles b.…

A: • Thus, 0.0128 moles of sulfur hexafluoride are present in 1.87 grams of this compound in correct…

Q: Consider that the combustion of an unknown amount of a hydrocarbon produces 0.2 moles of H2O.…

A: Given , 0.2 moles of H2O was formed

Q: How many moles of alkanes have 2 carbon atoms if there are 0.513 g?

A: Answer: number of moles of alkane (ethane) is 0.0171 moles

Q: Please solve a, b, c thank you

A: Lead(IV) selenite is Pb(SeO3)2  Molar mass of compound = 461.2 gm/mol  Mass of compound = 12.47 gm

Q: A.How many moles of boron trichloride,BCl3,are present in 4.75 grams of this compound? B.How many…

A: A.  Given that,  Mass of boron trichloride = 4.75 g Molar mass of boron trichloride = 117.17 g/mol…

Q: how many molecules of acetylene (C2H2) are in 1.79 moles of acetylene?

A: We know that according to mole concept., Number of molecules in one mole = Avogadro Number =…

Q: 1. Determine the molar mass of (a) potassium hexachloroiridate(IV), K2lrCls and (b) trifluorosilane,…

A: Determine the molar mass of the given complex--

Q: Calculate Moleculer mass of the H2SO4

A: Solution-  H2SO4 is the a strong acid.  atomic masses of H, sulfur and oxygen. H = 1.008 g/mol S =…

Q: An experiment requires that enough XeOF4 be used to yield 19.2 g of fluorine. How much XeOF4 must…

A:

Q: 5) Given the molecular formula C6H1004, what is this compound's empirical formula? A) CH2O B) C2H50…

A: Since in the empirical formula, the ratio of atoms are the smallest whole numbers. And since in the…

Q: How many grams of Ar are there in 4.28 moles of Ar? How many grams of Xe are there in a sample of…

A: (1) Atomic mass of argon gas is = 39.948 u While given moles of argon = 4.28 moles Then, by…

Q: C There are more moles of Ar than there are moles of N2.

A: Given that volume of both containers are same, and temperature also same.

Q: 1. Determine the Molecular Mass of the following compound: NH,C,H,O,

A: Dear student I have given answer to your question in the image format.

Q: How many moles of sulfur dichoride are present in 3.82 grams of this compound?  how many grams of…

A: given 3.82 grams of sulfur dichorideMolar mass= 102.97 g/mol102.97 gm of sulfur dichoride= 1 mole of…

Q: How many hydrogen atoms are in 27 molecules of diborane, B₂H₆?

A: The molecular formula of diborane is B2H6 We need to find number of hydrogen atoms present in 27…

Q: 8.95 x 1025 molecules of CCl4 to mol of CC14

A: Given that: Molecules of CCl4 = 8.95×1025 Mol of CCl4 =?

Q: Calculate the number of hydrogen atoms in 1.11 mol of acetaldehyde, C2H4O.

A: Introduction: As per the international system of unit (SI), mole is the unit of measurement for the…

Q: . How many ATOMS of carbon are present in 9.01 grams of carbon tetrachloride ?

A: Number of moles = mass/molar mass  Molar mass of CCl4 = 153.82 g/mol  1 mol = 6.022 × 1023…

Q: 30 How many grams of Mo(SO3)3 are in 1.60x1023 molecules of Mo(SO3)3?

A: Given, molecules of Mo(SO3)3 = 1.60*1023 Grams of Mo(SO3)3  = ? One mole on any substance contains…

Q: If a sample of ethanol has a mass of 1.34 x 104 mg, d) How many C atoms are in the sample? e) How…

A: Stoichiometry involves the calculation of concentration of solutions in the given conditions of…

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: Find the total number of atoms in a sample of cocaine hydrochloride, C17H22ClNO4, of mass 22.0 mg.

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

Q: Explain the concept of molecular weight ?

A: Molecular weight can be described as a sum of atomic mass of all the atoms present in a molecule.…

Q: There are molecules of methane in 0.123 mol of methane (CH 4).

A:

Q: How many hydrogen atoms are in 35 molecules of diborane, B₂H₆?

A: The molecular formula of diborane is B2H6. The structure of diborane is as follows:

Q: B. Calculating Average Molecular Mass 1. Glucose- C6H12O6 2. Tetrasulfur dinitride- S«N2 3. Diboron…

A: Average molecular mass can be calculated as follows

Q: Show your work: How many hydrogen atoms are present in.. 1200 octane, C8H18, molecules

A: One mole of a substance is the amount of the substance which consists of 6.023 × 1023 particles…

Q: 3- How many kinds of hydrogen atoms are there in the following molecules?

A: In the carbon compound the different kinds of hydrogen atoms depends on the type of carbon atoms.…

Q: A.How many grams of calcium carbonate,CaCO3,are present in 2.06 moles of this compound? B.How many…

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

Q: Show your work: How many hydrogen atoms are present in.. 54 dodecane, C12H26, molecules

A: The species dodecane is described as the saturated hydrocarbon having twelve carbon atoms are…

Q: Calculate the formula mass of the molecule from its structure. IN formula mass: amu N N

A: Formula mass of a molecule is defined as the sum of atomic mass of each atom present in the molecule…

Q: A sample of the male sex hormone testosterone, C19H28O2,contains 3.88 x 1021 hydrogen atoms. (a) How…

A: Atoms and molecules amount is calculated with the help of mole concept. A mole is defined as amount…

Q: How many chlorine atoms are there in 8.4 mol of PCl5, Phosphorous PentaChloride

A: The molecule given is PCl5  and moles of PCl5 = 8.4 Since 1 molecule of PCl5 has  1) 1 P atom  2) 5…

Q: 2. A hydrocarbon was found to be 20% hydrogen by mass. If the molar mass is 30 g/mol, what is the…

A: Note : As per our guidelines we are supposed to answer first question. Please repost the other…

Q: Consider a 2.12 g sample of C2H2. How many molecules are in this sample?

A: Given: Weight of C2H2=2.12 g The molar weight of the C2H2=26g/mol

Q: 16.04g

A:

Q: 1. How many MOLECULES of dinitrogen tetroxide are present in 4.82 moles of this compound ?

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

Q: Using molar masses along with the known formula of potassium chlorate, calculate the theoretical…

A: Given,  The theoretical mass percent of oxygen in potassium chlorate ( KClO3 ) is:

Q: (C12H,Cl402, molar mass 322.0 g/mol), is a potent poison. The average lethal dose in humans is…

A:

Q: etermine the molecular form a. Benzoyl peroxide (the e b. Ibuprofen by mass com approximately 206…

A:

Q: How many H2O molecules are there in a snowflake weighing 1 mg?

A:

Q: 2-In the Lab., some students calculated the empirical formula of magnesium oxide to be Mg20 instead…

A: Assume that you heated 0.297 g of magnesium and obtained 0.493 g of the oxide. What is the empirical…

Q: What is the mass percent of chlorine in NH4Cl?

A: First, find the total mass of NH4Cl.NH4Cl = 54g/mol

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17 H22 CINO4, of mass 22.5 mg…

A: Since we know that  1.0 mol of any substance = 6.022 × 1023 atoms  So first we calculate the number…

Q: A.How many moles of boron tribromide,BBr3,are present in 3.15 grams of this compound? B.How many…

A:

Q: An experiment requires that enough SiCI2 I2 be used to yield 18.1 g of iodine. How much SiCI2 I2…

A: Mass of iodine produced = 18.1 g   From the reaction we get that , 1 mol SiCl2 produce = 1 mol I2…

Q: Based on your answer in Part A (0.1 mol 13C), calculate the number of atoms in this amount of 13C?

A: One mole of any elements contains Avogadro number of atoms.  Avogadro number is 6.022*1023.

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.