The analysis of a compound gives the following percent composition by mass: C: 54.34 percent; H: 9.447 percent; S: 10.36 percent; O: 25.85 percent. What is its molecular formula given that its molar mass is 309.4 g? C?H?S?O C atoms = H atoms = S atoms =  O atoms =

Q: The density of water at 4.00°C is 0.967 g/mL. How many molecules of water are present in a 499.8 mL…

A: Given; density of water at 4.00Co=0.967 g/mL present volume of water we have=499.8 mL moles of water…

Q: how many ions or atoms of each element are in 160.5 g of the following substances?  a) H2 _?_ x1025…

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Q: Compound X2Z contains 32.2% X by mass. What mass of the compound contains 36.7 g X?

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Q: In this quantity of gold? [4.5 9. 64,456 g/mol) in A 55kg woman has 7.5 x 10-3 mol of hemoglobin…

A: The given data contains,  =7.5 ×10-3According to mole concept,1 mole of compound contains 6.022…

Q: The chemical formula for octane is: CH;(CH,),CH, Calculate the molar mass of octane. Round your…

A: To calculate the molar mass of octane.

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g)Cl2(g) to an aqueous…

A: The mass of the substance can be calculated if the molar mass and moles of that substance are known.…

Q: What is the mass in grams of 7.3 x 1024 molecules of lactic acid (C3H6O3), the compound responsible…

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Q: A 12.3 g sample of a compound known to consist of only carbon and hydrogen was found to be 14.40 %…

A: Mass of sample = 12.3 g Hydrogen percent by mass = 14.40 % Mass % = Mass of solutemass of…

Q: he empirical formula for trichloroisocyanuric acid, the active ingredient in many household…

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Q: The molecular formula of allicin, the compound responsible for the characteristic smell of garlic,…

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Q: Consider the reaction: P4(s) + 6Cl₂(g) → 4PC13 (1) Given an initial mass of 15.75 g P4, an excess of…

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Q: Sodium hydroxide, NaOHNaOH, is a strong base that is used in industrial synthesis and processes such…

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Q: Ibuprofen, the anti-inflammatory drug in Advil, has the formula C13H18O2 What is the empirical…

A: Ibuprofen is an anti-inflammatory drug

Q: A student obtains a mixture of the chlorides of two unknown metals, X and Z. The percent by mass of…

A: Given: Mixture of metal X and Z. And mass percent of X and Z in the mixture.

Q: Please answer questions 3a and 3b. Questions are provided in the attached image. Thank you.

A: Gravimetric analysis is a quantitative method through we can accurately determine the amount of…

Q: Prevacid is used to treat gastroesophageal reflux disease (GERD).Thechemical formula of Prevacid is…

A: The question is based on mole concept. we have to calculate the mass of fluorine atoms of carbon.…

Q: complete reaction

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Q: For many years the recovery of gold—that is, the separation of gold from other materials—involved…

A: a.

Q: A combustion analysis is a technique to find the the empirical formula of compounds. In a combustion…

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Q: A compound is 54.53% carbon, 9.15% hydrogen, and 36.32% oxygen by mass. What is its empirical…

A: This question belongs to Mole concept. we have used formula  Mass % of an element = Mass of that…

Q: A 58.5 g sample of an unknown compound that contains only carbon, hydrogen and oxygen was analyzed…

A: Given: The mass of the unknown compound is 58.5 g The mass of CO2 (carbon dioxide) is 105.6 g The…

Q: Hydrogen cyanide, HCN, is prepared from ammonia, air, and natural gas ( CH4) by the following…

A: The balance chemical reaction :  2NH3(g) + 3O2(g) + 2CH4(g) ---Pt---> 2HCN(g) + 6H2O(g)  Mass of…

Q: The molecular formula for dinitrogen tetraoxide is N,O,. Is this the empirical formula for this…

A: The empirical formula can be defined as the simplest whole-number ratio of all the atoms present in…

Q: 2. What is the percent by mass of each element in the following compounds? Compound % By Mass(for…

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Q: (a) What is the mass, in grams, of 1.223 mol of iron(III)sulfate?(b) How many moles of ammonium ions…

A: (a) Given, Moles of iron (III) sulfate is 1.223 mol Molar mass of iron (III) sulfate is 399.88 g/mol…

Q: Cinnamic alcohol is used mainly in perfumery, particularly in soaps and cosmetics. Its molecular…

A: Given, Molecular formula of Cinnamic alcohol is C9H10O  Mass of sample = 0.668 g     Required,…

Q: What is the percentage composition by mass of the substance shown below? %C = i % S = i %H = i How…

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Q: The chemical formula for octane is: CH; (CH,),CH; 9. Calculate the molar mass of octane. Round your…

A: Octane is saturated hydrocarbon compound which is a component of gasoline i.e pertrol.  It is…

Q: explain why the number of atoms and moles are different when the volumes are nearly identical?

A: 1. The table contains the data required to solve this problem.

Q: The analysis of a compound gives the following percent composition by mass: C: 56.62 percent; H:…

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Q: a. A piece of iron metal with a mass of 42.5g is burned in the presence of oxygen. The resulting…

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Q: Nitroglycerin (C3H;N3O9) is a powerful explosive. Its decomposition may be represented by 4C3H3N309…

A: a)  Given,

Q: If 6.3 × 10²⁵ molecules of CO₂ are produced in a combustion reaction, what is the mass in kg of CO₂…

A: We have given  Molecules of CO2 = 6.3 × 1025  We have to calculate  Mass of CO2 = ? Kg

Q: Which of the following has the largest number of molecules? O1g of formaldehyde, CH,0 Oig of…

A: The largest number of molecules is present in

Q: Two hypothetical ionic compounds are discovered with the chemical formulas XCI2 and YCI2, where X…

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Q: Nitroglycerin (C3H5N3O9) is a powerful explosive. Its decomposition may be represented by 4C3H5N3O9…

A: 4C3H5N3O9 ⟶ 6N2 + 12CO2 + 10H2O + O2 Mass of C3H5N3O9= 2.0x 102 g Molar mass of C3H5N3O9= 227 g/mol…

Q: 3. A student heated an unknown hydrate, Na,SO4•XH,O, in a crucible. The water was driven off,…

A: The reaction when Unknown hydrate is heated – Na2SO4.XH2O →∆Na2SO4 +X H2O

Q: 3. A student heated an unknown hydrate, Na,SO4 XH,0, in a crucible. The water was driven off,…

A: Mass of water loss = 0.895 g mass of anhydrous salt = 0.695 g MW of anhydrous salt = 142.04 g/mol…

Q: A combustion analysis is a technique to find the the empirical formula of compounds.  In a…

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Q: (a) What is the mass, in grams, of 4.62  1023 molecules of aspirin, C9H8O4?

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Q: What is the mass in grams of 6.56 x 1022 molecules of lactic acid (C3H6O3), the compound responsible…

A: 1- First we need to calculate the moles of lactic acid :  Moles of lactic acid = [ number of…

Q: How many grams are in 2.3 x 1024 formula units of KNO3?

A: Welcome to bartleby!

Q: What is the percentage composition by mass of the substance shown below? % C = % S = % H = How many…

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Q: The empirical formula of a compound is C4H9. It's molecular mass is 114g/Mol. What is its molecular…

A: We have to predict the molecular formula.

Q: The atomic mass of Cl is 35.45 amu, and the atomic mass of Al is 26.98 amu. What are the masses in…

A: Atomic masses of Chlorine and Aluminum are given as: Cl = 35.45 amu Al = 26.98 amu Molecular mass of…

Q: Sodium sulphate is used in detergents and can be synthesized by the following unbalanced reaction:…

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Q: Nitroglycerin (C3H5N309 ) is a powerful explosive. Its decomposition may be represented by 4C3H5N309…

A: a mole of a substance will always weigh its molar mass at STP   moles =mass takenmolar mass

Q: 1) Glucose has the formula C6H12O6. What is the percent composition of oxygen in glucose to three…

A: 1. Given data:  Glucose  molecular formula = C6H12O6 % composition of oxygen = ? Molar mass of…

Q: A high-performance heater that burns propane, C3H8(g), is adjusted so that 100.0 g of O2(g) enters…

A: The number of moles of oxygen (O2) present (nO) in 100.0 g of oxygen gas is calculated using…

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.