The lanthanide elements react with oxygen to give compounds of the type Ln2O3 (where Ln stands for a lanthanide element). However, there are interesting exceptions, such as a common oxide of terbium, TbxOy. a) Given that the compound is 73.945% Tb, what is its formula?

Q: Some salts have water of hydration and are called hydrated salts. A 3.216 g sample of a hydrated…

A: Step‐1       Given,       mass of hydrated salt  Nax By Oz .X H2O=3.216g       mass of  anhydrous…

Q: Ibuprofen, C13H18O2, is a covalent compound and the active ingredient in several popular…

A:

Q: When 6.65 g of the hydrate NiSO4 • xH2O was heated in a vacuum, the water was driven off and 3.67 g…

A: NiSO4 . xH2O is a hydrated form of nickel Sulphate and the water involved is called water of…

Q: CxHyOz

A:

Q: A) What is the formula of magnesium melonite dihydrate?  B) What is the mass % of melon in copper…

A:

Q: 3.135 A certain metal M forms a bromide containing 53.79percent Br by mass. What is the chemical…

A: Let the mass of the compound be 100 g. Then the mass of the Br is 53.79. Calculate the mass of the…

Q: A rock is 5.0% by mass fayalite (Fe₂SiO₄), 7.0% by massforsterite (Mg₂SiO₄), and the remainder…

A:

Q: A metal (M) forms an oxide with the formula M2O. If the oxide contains 16.99% O by mass, what is the…

A: The given data contains, mass of Oxygen = 16.99 g. Thus mass of M= 100-16.99 = 83.01 g.

Q: Determine the empirical formulas of the compounds withthe following compositions by mass:(a) 10.4%…

A: % by mass of C = 10.4%% by mass of S = 27.8%% by mass of Cl = 61.7% Assuming the mass of the…

Q: An experiment requires that enough C,H1206 be used to yield 11.7 g of oxygen. How much C,H1206 must…

A: Given : mass of oxygen, O2 to be yielded = 11.7 g Molar mass of O2 = 32 g/mol Since mass = moles X…

Q: a sample of pure alumina hydrate was obtained from a bag of flame retardant. A 5.000g sample of the…

A: Given, Mass of sample = 5.000g. Final weight of sample after heating = 2.651g. The mass of water in…

Q: Phosgene, a substance used in poisonous gas warfare during World War I, is so named because it was…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: How many grams of CH3CO2C5H11 must be weighed out to provide 3.22 x 1023 atoms of H? When you input…

A: Mole in terms of particles : 1 mol = 6.022 x1023 particles  where particles =…

Q: 5. Oxides of sulfur are common air pollutants. If a compound is found to be 50% oxygen empirical and…

A: Calculation of empirical formula:

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

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

Q: The composition of sorbic acid is 64.3% C, 7.2% H and 28.5% O. Since its molecular mass is 112 alb,…

A: Given : Mass % : C=64.3% H=7.2% O= 28.5%

Q: Ibuprofen, a potent headache remedy, has a molar mass of about 206 grams and has been determined to…

A: Empirical formula represents the simplest whole number ratio of atoms of elements present in the…

Q: Thiophene is a liquid compound of the elements C, H, and S. A sample of theophrastus weighing 7.96…

A: Given: mass of theophrastus = 7.96 mg = 0.00796 g mass of CO2 = 16.65 mg =0.01665 g mass of…

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

A: Given, molecular formula C4H8

Q: Acetaminophen, an analgesic and antipyreticdrug, has a molecular mass of 151.2 u and a masspercent…

A: Given that:                  Molecular mass of acetaminophen = 151.2 u…

Q: A sample of a “suboxide” of cesium gives up 1.6907% of its mass as gaseous oxygen when gently…

A:

Q: Question attached

A: Number of moles of the substance is equal to the ratio of mass to the molar mass of the substance.…

Q: A strikingly beautiful copper compound with the common name “blue vitriol” has the following…

A: Since the compound is having Cu, S, H and O hence we can say that the empirical formula of compound…

Q: A compound with the rather imposing name 2,2'-azo-bis-isobutyrylnitrile is used to initiate the…

A: Given : molecular formula of compound is = C8H12N4. To find : type of atom and number of atoms and…

Q: There are ________ atoms of hydrogen in 300 molecules of CH3CO2H.

A: It is given that there are 300 molecules of CH3CO2H.

Q: 2. A given sample of caffeine, C,II,N,0, has 0.23 g of carbon atoms in it. Hle nitrogen atoms are…

A: Mass of C atom = 2.3 g  Molar mass(MM) of C = 12 g/mol Moles of C = mass/MM          = 2.3/12   =…

Q: An elemental analysis of the acid indicates that it is composed of 5.89% H, 70.6 % C and 23.5% O by…

A:

Q: Consider a 214.6 g sample of the compound manganese(IV) perchlorate. Using the formula Mn(CIO), (MM…

A:

Q: A metal (M) forms a compound with the formula MCl3. If the compound contains 65.57% Cl by mass, what…

A: Let the mass of the compound be 100 g. Mass of chlorine present in the compound = 65.57 g Mass of…

Q: what is the empirical formula of a compound that is 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O?

A: The empirical formula of a chemical compound is the simplest whole number ratio of all the atoms…

Q: 4. Calculate the molecular and Empirical formula of the compound following compositions; Cr =…

A: Determination of empirical formula  The percentage composition of elements present in given compound…

Q: Q9. Nitrogen is a highly reactive element and has many forms of oxides and nitrogen content of these…

A:

Q: Fluorine is so reactive that it forms compounds with mate-rials inert to other treatments.(a) When…

A: Fluorine is the most electronegative and reactive element of the periodic table. It requires one…

Q: If 5.467g of KAi(OH)4 was the limiting reagent in the synthesis of Alum, what would the mass of Alum…

A: Given, Mass of KAl(OH)4 = 5.467 g Yield of the reaction =98% = 0.98 To find: Mass of alum

Q: 3. a. If "Epsom salt", MgSO4. xH₂O, is heated to 250 ° C, all the water of hydration is lost. Write…

A: Epsom salt = MgSO4. xH2O xH2O is the water of crystallization attached physically to the salt.   a)…

Q: a compund with the formula MNO3 contains 28.3% oxygen by mass. What is the identity of element M?

A: Mass percentage is defined as the ratio of mass of the substance ( here element) to the total mass…

Q: A metal (M) forms an oxide with the formula M₂O. If the oxide contains 3.835% O by mass, what is the…

A: Formula of metal oxide is M2O. Molar mass of oxygen is 16 g.mol-1.  Consider the molar mass of metal…

Q: How many moles would 1.00 x 1023 molecules of methane ( CH4 ) represent? How many Sulfur atoms would…

A: According to avogadro's rule number of molecule present in 1 mole of substance is 6.022×1023, and…

Q: Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A…

A: Given data is: Length of plate = 15.0 cm Width of the plate = 12.5 cm Thickness of plate = 3.00 mm…

Q: How many atoms of iron are there in 2.01 moles of wolframite, FeWO4?

A: Given,Moles of FeWO4 = 2.01 mol1 mole of FeWO4 contains 1 mole of iron (Fe). Therefore, 2.01 moles…

Q: A certain metal hydroxide, M(OH)2, contains 32.8%% oxygen by mass. What is the identity of the metal…

A:

Q: Determine the empirical formulas of the compounds withthe following compositions by mass:(a) 55.3%…

A: To determine the empirical formulas of the compounds: a).

Q: One form of asbestos called chrysotile is considered to be a human carcinogen. Mass analysis shows…

A: Given: 26.3% Mg, 20.2% Si, 1.45% H   Let mass of compound be 100 g. then it contain 26.3 g of Mg,…

Q: 6. The mineral enargite is 48.42 % Copper. 19.02 % arsenic and 32.57% sulfur by mass. What is the…

A:

Q: Some salts have water of hydration and are called hydrated salts. A 3.216 g sample of a hydrated…

A: In this question initially, a number of moles of each element will be calculated. Then the smallest…

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: In 7.2 moles of Potassium Dichromate, K2Cr2O7 How many atoms of O are there?

A: Number of atoms

Q: An antacid tablet weighing 0.928 g contained calcium carbonate as the active ingredient, in addition…

A: Since you have posted multiple un-related questions, we are entitled to answer the first only.

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.