Potassium ferric alum has the formula: KFe(SO,)2 .XH2O. A sample of 1.26 g of this alum was heated in a crucible to get a constant mass. The mass of the anhydrous salt produced (KFe(SO,)2 ) was 0.72g. Calculate the value "x" in the formula of the alum.

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: The lanthanide elements react with oxygen to give compounds of the type Ln2O3 (where Ln stands for a…

A: Empirical formula :- The simplest formula which shows only the relative number of atoms of different…

Q: the number of copper atoms in a 3.0g lump of copper is 2.8x1022 .how many electrons present in the…

A: Number of copper atoms = 2.8 × 1022  We need to determine number of electrons present.

Q: Lithium nitride reacts with water to produce ammonia and lithium hydroxide according to the equation…

A: Molar mass of D2O = (2.014 x 2) + 16 = 20.028 gm/mol Molar mass of ND3 = 14 + (2.014 x 3) = 20.042…

Q: Your doctor has diagnosed you as being anemic-that is, as having too little iron in your blood. At…

A:

Q: Certain kinds of zeolite have the general formula M2O·Al¿O3'ySiO2'wH2O, where M is an alkali metal…

A: Concept introduction: Zeolites are the compound having hydrated form of aluminosilicate. Mass% is…

Q: A metal (M) forms an oxide with the formula MO. If the oxide contains 39.70 % O by mass, what is the…

A: Molar mass of an element is its characteristic property .So to identify the metal, first its molar…

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: How many atoms of sulfur are in 81 g of Na₂S₂O₃ ?  Atomic weights:  Na=22.99, S=32.07, O=15.99.

A:

Q: The mass ratio of sodium to fluorine in sodium fluoride ls 1.21:1. A sample of sodium fluoride…

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Q: What is the mass, in grams, of each of the following samples? a.) 2.75 mol of iron, Fe  b.) 0.115…

A: Mole of solid sample is calculated by below formula,

Q: 1. Sodium is an alkaline metal which is very reactive and so is not found free in nature. Sodium…

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

Q: How many atoms of O are found in 1.00 x 10 2 g of K 2Cr 2O 7 ?

A: Number of atoms of Oxygen present in the given compound can be calculated as -

Q: When 0.220 g of iron (atomic weight %3D 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: Given, Mass of iron = 0.220 gm Mass of iron oxide = 0.341 gm Mass of oxygen = mass of iron oxide -…

Q: The semi-precious stone turquoise is a hydrate and with the chemical formula CuAl₆(PO₄)₄(OH)₈･4 H₂O.…

A: We are required to find out the mass percent of aluminium, oxygen and water in the…

Q: How do I calculate the theoretical mass percent of barium in a sample of BaCl2*2H2O?

A: Generally, the %mass is determined by dividing the species mass with total mass of sample which then…

Q: In an experiment, the reaction of 100.0 g of iodine produced 144.9 g of a compound formed from…

A: It is an example of law of conservation of mass

Q: Sodium is an alkaline metal which is very reactive and so is not found free in nature. Sodium forms…

A:

Q: 0.93 g sample of NaCr(SO4)2.XH20 was heated in a crucible to get a constant mass. If the mass of the…

A: In this question, we want to determine the value of x in the given Compound. How we will determine,…

Q: Determine the Average Atomic Mass of the mixtures of Hydrogen isotopes. 99% 'H, 0.8% ²H, and 0.2% 'H

A: Answer is explained below.

Q: When 0.210 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: The symbol for iron is Fe The symbol for oxygen is O The molar mass of Fe is 55.85g/mol The molar…

Q: a. What would be the formula of the compound formed by a reaction of chlorine with calcium (Ca)? b.…

A: We have reaction of chlorine and calcium , chlorine with strontium , we have to predict the formula…

Q: Calculate the mass percent of oxygen (O) in dinitrogen oxide (N2O) to the nearest 0.01%. Number

A: Molar mass of Nitrogen =14 g/mol  Molar mass of Oxygen = 16 g/mol  Molar mass of N2O = (14*2)+16…

Q: Glycine, one of the essential amino acids, has two carbon atoms, five hydrogen atoms, twO oxygen…

A: From given  Gylcine has 2 carbons (C2), five hydrogen (H5) 1 Nitrogen (N) and 2 Oxygens (O2) atoms.

Q: What is the alumina content in weight % of the garnet with Al as the only 3+ cation has Mg2.508…

A:

Q: What is the molar mass of the compound with the formula X2Y2Z7, where X is an alkali metal from the…

A: Given: The compound with the molecular formula, X2Y2Z7, X= alkali metal from the 3rd period. Y= an…

Q: The ratio of the mass of O to the mass of N in N2O3 is 12:7. Another binary compound of nitrogen has…

A: The given ratio of mass O to the mass of N in N2O3 is 12:7 Mass of O in N2O3 = 3x16 amu…

Q: Find the mass of 2.54 X 1023 molecules of Ca(OH)2? Use: Ca = 42.0g, H = 1.15g and O = 15.8g as…

A:

Q: Find the molar mass of the following chemicals: Sodium (Na) Calcium (Ca) Xenon (Xe) Gadolinium (Gd)…

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Q: C. What is the weight of ferrous sulfate FeSOa.7H: 0 should be taken to designate iron as ferric…

A: Recall the following reaction that will occur on heat of hydrated ferrous sulphate      FeSO4.7H2O…

Q: Calculate the exact masses of the ions C5H8O1 and C6H12 1, both of which have a nominal mass of 84.…

A: The organic compounds can be identified by various characterisation techniques. For example, NMR,…

Q: 19.18. What is the empirical formula of a mineral contg. 3.37% HO; 19.10% AlO: 21.00% CaO; and…

A: Empirical formula is the simplest formula of a compound which show ratio of atoms or molecules in…

Q: Stibnite, Sb2S3, is a dark gray mineral from which antimony metal is obtained. What is the mass…

A:

Q: 5- Calculate the mass percent nitrogen in 14 grams of (NHA)2CO3. (molar mass = 96 g/mol, Atomic…

A: Option B is correct.

Q: 2. Explain how the chemical formulas H (aa and H.O for the same thing. are interchangeable notation…

A:

Q: The anticancer drug Platinol (Cisplatin), Pt(NH₃)₂Cl₂,reacts with the cancer cell’s DNA and…

A: The amount of a particular compound present in a solution is expressed by the various concentration…

Q: 50 4 grams of impure sodium chloride is dissolved in water and excess of silver nitrate solution is…

A: Molar mass of NaCl = 58.44g/mol Molar mass of AgCl = 143.32g/mol Molar mass of Cl = 35.45g/mol

Q: Cobalt(II) sulfate heptahydrate has pink-colored crystals. When heated carefully, it produces…

A: The roman number (II) written after Cobalt in the names Cobalt(II) sulfate heptahydrate and…

Q: What is the mass percent composition of platinum in the carboplatin, C6H12N2O4Pt? Relative atomic…

A:

Q: Using the % mass composition of N, calculate the mass of nitrogen present in 9.41 grams of the amino…

A:

Q: When 0.210 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: Given  Wt. If iron = 0.210 g  Wt. Of iron oxide = 0.341 g  Atomic weight of iron = 55.85 g/mol…

Q: A sample of 0.262 mol of a metal M reacts completely with excess fluorine to form 20.5 g of MF2.…

A:

Q: 10) A patient is to be given 2 litres of 0.9% sodium chloride via intravenous infusion over a 24…

A: From given concentration of sodium chloride we can calculate the millimoles of sodium.

Q: A rock is 17.5% by mass fayalite (Fe2SiO4), 17.6% by mass forsterite (Mg2SiO4), and the remainder…

A: Answer: First of all we will calculate the mass of each element in fayalite, frosterite and silicon…

Q: Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of…

A: Isotopes are elements with the same number of protons but differ in the number of neutrons. The…

Q: To what weight of AICI3 would 0.280 g of AgCl correspond? Atomic weights for Ag = 108, Cl = 35, Al =…

A: Molecular weight of AgCl = (108 + 35 ) = 143 g/mol  So, 143 g AgCl = 1 mol AgCl  1 g AgCl = 1/143 =…

Q: Uranium (VI) fluoride (UFe) can be used for the enrichment uranium. What is the elemental…

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Q: Find the mass of 2.45 X 1023 molecules of Ca(OH)2? Use: Ca = 42.0g, H = 1.25g and O = 15.7g as…

A:

Q: What would be the mass, in kilograms, of a block of graphite consisting of 1.55 x 1026 carbon atoms?

A:

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.