64 g of Na2SO4 • xH2O were heated to yield 2.84 g of Na2SO4 What is the value of x?

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 molecular weight was determined for a gas that is known to be an oxide of nitrogen. The value…

A: Molecular weight is the sum of the atomic masses of each atom present in the molecule. Atomic mass…

Q: what is the precent mass of oxalat in (K3Fe(C2O4)3·3H2O, 491.3 g/mol)?

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Q: Combustion of a 175 mg sample of phenol (a disinfectant containing C, H, and O) yielded 491 mg CO,…

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Q: Upon burning Mg in air, magnesium oxide and magnesium nitride are formed. The correct statement…

A: In this question, we will see the correct statement for Magnisium nitride.  You can see details…

Q: Upon burning Mg in air, magnesium oxide and magnesium nitride are formed. The correct statement…

A: Here, it is given that, upon burning magnesium in the air, magnesium oxide and magnesium nitride are…

Q: If the m. Wt. of BaSO4 = 233.42 g/mol %3D and m. Wt. of Na(SO4)2= 140.02 g/mol and wt of…

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Q: A tube of Thothpaste contains 0.76 g of sodium monofluorphosphate (Na2PO3F) in 100 mL. a)what mass…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

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

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Q: A 22.6622.66 g sample of a compound contains 7.237.23 g of potassium, K,K, 6.566.56 g of chlorine,…

A: The values are given as follows:

Q: An element X forms both a dichloride (XCl2) and a tetrachloride (XCl4). Treatment of 10.000gm of…

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Q: A common ingredient in homemade laundry detergents is Washing soda, you were asked to do an analysis…

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Q: Q/ calculate of the molar mass (Al2(OH)3 * ,Al=26.98, O=16,H=1

A: The molar mass is the weight of one sample mole. Connect the atomic masses (atomic weights) of all…

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: MgSO4•7H2O what is themolar mass g/mol?

A: We can calculate the molar mass of MgSO4•7H2O by adding the mass of all atoms which are present in…

Q: 4.64 g of Na2SO4 • xH2O were heated to yield 2.84 g of Na2SO4 What is the value of x?

A: The decomposition reaction taking place on heating is  Na2SO4•xH2O ------> Na2SO4 + x H2O

Q: Acetaminophen, C8H9NO2, is a covalent compound and the active ingredient in several popular…

A: The formula of the compound Acetaminophen is C8H9NO2. Hence each molecule of C8H9NO2 contains 1) 8…

Q: Which titanium-containing mineral, rutile (Ti O 2 ) orilmenite (FeTi O 3 ), has the larger…

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Q: A common ingredient in homemade laundry detergents is Washing soda, you were asked to do an analysis…

A: Molar mass is defined as an average mass of atoms present in the chemical formula. It is the sum of…

Q: How many moles of Co(NH3)6CI3 were present in the sample?

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Q: How many grams of diazine (N2H2) are there in 2.01 mol of the compound? ______________________ g

A: The molar mass of diazine is:

Q: The molar mass of nicotine C10H14NX is 162 g/mol. What is the value of x?

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Q: An aluminum-containing compound has the formula Mg, Al,0, and is 44.98% oxygen by mass. What is the…

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Q: An experiment requires that enough C6H12O6 be used to yield 17.2g of oxygen . How much C6H12O6 must…

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Q: How do I calculate the numner of moles contained in this sample? 1.06 x 10 (to the 25th power) atoms…

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Q: 6. Write the empirical formula for acetylene.

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Q: If the m. Wt. of BaSO4 = 233.42 g/mol and m. Wt. of Na(SO4)2= 140.02 g/mol and %3D wt of…

A: Given that M.W of BaSO4 = 233.42 g/mole  M.W of Na2SO4 = 140.02 g/mole  Weight of Na2SO4 = 1.5 g

Q: Given that a 40.14 g sample of hydrated NiSO4•XH2O is reduced in mass to 22.14 g upon heating.…

A: Given:Mass of NiSO4.XH2O = 40.14 g.Mass of NiSO4 = 22.14 g. (On heating water molecules…

Q: A sample of 0.741 mol of a metal M reacts completly with excess flourine to form 57.8 g of MF2. What…

A: Chemical equation: M  +  F2  ------>  MF2 Number of moles of MF2 = number of moles of M

Q: The molar mass and empirical formula of several compounds listed. Find the molecular formula of…

A: Empirical formula refers to the formula of a compound in which the elements are present in the…

Q: mol AB-016 A student was given a sample of hydrated Na2CrO4 (molar mass of anhydrous Na2CrO4. 162.0…

A: Number of moles of anhydrous sample and water is calculated as above,

Q: A 9.500 g sample of CaCl2 XH20 after heating gives an anhydrous residue of 6.348 g. What is the…

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Q: How many grams of diazine (N2H2) are there in 1.351.35 mol of the compound?

A: Given:Number of moles = 1.35 molesMolar mass of diazine = 30.02928 g/mol.

Q: The weed killer “Roundup” has a chemical formula of ( C3H8NO5P) What is its molecular mass?

A: The overall mass of one molecule of a substance is generally known as molecular mass (or molar…

Q: Nicotine, a component of tobacco, is composed of C, H and N. A 5.20-mg sample of nicotine was…

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Q: - Give the empirical formula for vitamin C (ascorbic acid), C,H%O6 .

A: What is empirical formula of Ascorbic acid ?

Q: How do I calculate the mass of arsenic ion (AsO4-3 )

A: Steps to find mass of compound - 1) find mass of each single element. 2) multiply mass of an element…

Q: Given the reaction below, if  3.64 moles of Vanadium (V) were reacted with 4.88 moles of Oxygen (O2)…

A: First see the mol ratio of V and O2 from the reaction , and apply it for the reaction.

Q: calcuya te 6011owing (a) ob molecues in 0•250 moles ob NH3 Num ber un

A: According to mole concept, 1 mole of any substance is equal to the Avogadro number (6.022 × 1022)…

Q: A binary compound of oxygen and an unknown element, X, has the formula X20 and is 53.55 mass %…

A: Ionic or covalent : An ionic bond is formed from one atom to another atom and forms attaches through…

Q: How many atoms of chlorine (CI) are present in 0.072 g of FeCI,? Given that ; Fe= 56 g /mol, Cl=…

A: Given that mass of FeCl = 0.072 g Molar mass of Fe = 56 g/mol, Cl = 35.5 g /mol Hence, molar mass of…

Q: What mass of sodium would be in a 124.56 g sample of sodium thiosulfate? Na2S2O3?

A: Introduction: Mass of  sodium thiosulfate = 124.56 g

Q: Narceine is a narcotic in opium that crystallizes from solu-tion as a hydrate that contains 10.8…

A: The value of x in narceine.xH2O is to be determined.

Q: A 0.415 mol sample of MnX2O7 has mass of 85.14g identify X indicating the symbol and not the name of…

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Q: What amount (moles) of  SO3 is represented by 2.00 kg of sulfur trioxide

A: 32.5 mole of SO3 is represented by 2.00 kg of sulfur trioxide.

Q: In order to determine the formula of CoCl.xH;O, a student heated 0.476 g of hydrate. The mass of…

A: First of all we have to calculate the weight of water that goes off after being heated.  Convert…

Q: Serotonin (μ=176 g/mol) transmits nerve impulses be-tween neurons. It contains 68.2 mass % C, 6.86…

A: The formula in which the actual number of atoms of each elements are written as the subscripts with…

Q: Compound x has a molar mass of 180.15 g•mol and the following composition: element mass % carbon…

A: Given: Molar mass of X = 180.15 g mol-1 Carbon = 40.00% Hydrogen = 6.71 % Oxygen = 53.29% Known:…

Q: =-Li cat. H2SO4 HCO,H 90 оС THF, -78 °C

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Q: 1.00 g of hydrated potassium carbonate, K2CO3•nH2O, is heated to 250 °C to give 0.836 g anhydrous…

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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.