When a 220 g sample composed of ibuprofen (C13H1802) and some inert material is added, the mass of carbon produced is determined to be 58.2g. Assuming that ibuprofen is the only source of carbon. What percentage of the total mass of sample is due to ibuprofen? (The mass percentages of hydrogen and oxygen in ibuprofen are respectively 8.80% and 15.51%)

Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O:…

A: The given reaction is, 4 NH3 (g) + 7 O2 (g)  →   4 NO2 (g)  + 6 H2O (g) The reaction is already…

Q: The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of…

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Q: A 2.63 g2.63 g sample of a compound consisting of carbon, hydrogen, oxygen, nitrogen, and sulfur was…

A:

Q: The only reactant in this decomposition reaction is potassium chlorate, KClO3. The manganese(IV)…

A: in decomposition reaction one compound is breaking into two or more compounds.

Q: Based on the law of conservation of mass, how many grams of hydrogen gas, x, are formed by the…

A: Given, 66.0 g zinc + 72.9 g hydrochloric acid produces 136.3 g zinc chloride+ x g hydrogen gas. We…

Q: * Question Completion Status: Barium oxide was synthesized form the reaction of barium and oxygen in…

A: Barium reacts with oxygen to form barium oxide. The equation for the balanced chemical reaction is…

Q: Calculate the mass, in grams, of 992 atoms of cesium, Cs (1 mol of Cs has a mass of 132.91 g).

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Q: Some brands of salami contain 0.090% sodium benzoate (NaC2H3O2) by mass as a preservative. If you…

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Q: Given a 240.0 g sample of sulfur trioxide, how many grams of oxygen are produced, assuming the…

A: Number of moles of SO3 = mass / molar mass Number of moles of SO3 = 240 g / 80.066 g / mol = 2.99…

Q: The atomic weight of bromine is 79.904, yet no atom of bromine weighs 79.904 amu. Why is this true?

A: Given : The atomic weight of bromine is 79.904, yet no atom of bromine weighs 79.904 amu.

Q: 32. How many grams of Li;N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: A 3.23 g sample of calcium sulfide was decomposed into its constituent elements producing 1.80 g of…

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Q: Calculate the mass of 5.70 X 10^22 tungsten atoms.

A: Given No of atoms of tungsten = 5.70 x 1022   Also, Molar mass of tungsten =  183.84 g

Q: Calculate the mass (in g) of 2.0x10^24 atoms of Pt.

A: Given, number of atoms of Pt = 2.0 x 1024 atomsWe know, => moles of Pt = number of atoms of Pt /…

Q: Iron exists in nature as a mixture of predominantly three isotopes: ⁵⁴₂₆Fe (53.94 amu), ⁵⁶₂₆Fe…

A: We have to calculate the percentage of rarest of three isotopes.

Q: Find the number of hydrogen and oxygen atoms present in 15.0 g of pure hydrogen peroxide

A: we have to calculate  the number of hydrogen and oxygen atoms present in 15.0 g of pure hydrogen…

Q: If you start with 675.2 g of S8 and 975.2 g of O2, what mass of SO3 will be produced? S8 +12O2 =…

A: Given :  S8 +12O2 = 8SO3 mass of S8 = 675.2 g  mass of O2 = 975.2 g  To be calculated :-  mass of…

Q: 56.7 g of H,S reacts with 30.9 g of SO, according to this reaction + SO, 2H,S + So, = 35 + 2H,0 What…

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Q: Which element comprising Ma(OH)2 has the highest percentage by mass?

A: The compound given is Mg(OH)2. Assuming 1 mole of Mg(OH)2.

Q: Calculate the mass percentage of carbon in a mixture that contains 244 grams of potassium carbonate…

A: Molar mass of K2CO3 = 138 g/mol Molar mass of citric acid = 192 g/mol

Q: Total moles of magnesium

A: We have to find moles of Magnesium

Q: Magnesium exists in nature as three stable isotopes. Suppose you determine that 9.87 moles of…

A: Given - Exact masses of isotopes of Mg 25Mg = 24.9858 amu 24Mg= 23.9850 amu. 26Mg = 25.9826 amu. To…

Q: 113.4 g of H,S reacts with 247.8 g of SO, according to this reaction. 2H,S + SO, 35 + 2H,0 What mass…

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Q: A sample of trifluoroacetic acid, C2HF3O2, contains 32.1 g of oxygen. Calculate the mass of the…

A: Given,  Mass of O in a sample of C2HF3O2 = 32.1 g Calculate the mass of C2HF3O2 sample = ?

Q: If 4 Kg of Gallium (Ga) is reacted with 11 Kg of Nitrogen (N). what mass of GaN will be formed? The…

A: We have given 4 Kg = 4000 g of Gallium (Ga) which is reacted with 11 Kg = 11000 g of Nitrogen (N2).…

Q: Yzed 3.725 g of an unknown mixture of NaCl, SiO2, and CaCO3. You isolated 1.108 g NaCl, 0.848 g…

A: Given information- total mass of mixture = 3.725 g  mass of NaCl = 1.108 g  mass of SiO2   = 0.848 g…

Q: 1.Aluminum reacts with oxygen to produce aluminum oxide (Al203). The balanced chemical equation for…

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Q: Calculate the mass, in grams, of sample.  7.9x10^21 uranium atoms

A: GIVEN: To solve: Mass in grams of uranium atom sample=?

Q: A given sample of xenon fluoride contains molecules of a single type XeFn, where n is some whole…

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Q: 22. As in question 21 determine the mass % of N (nitrogen atoms) in ammonia (NH3), urea (CHẠN2O) and…

A: Mass percent is the mass of the element divided by the mass of the compound or solute.

Q: Calculate the amount of carbon (in moles) contained in a 2.65 g pencil “lead.” (Assume that the…

A: The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a…

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

A: Empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a…

Q: What is the total number of oxygen atoms on the left-hand side of this chemical equation? 2 Ca₂…

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Q: A 0.933 g sample of Nickle metal is heated in the presence of nitrogne gas forming 1.081 grams of a…

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Q: Determine the mass (in grams) of aluminum present in 1.08 grams of Al2S3?

A: Molar mass of the elements is equal to the sum of the atomic masses of all the elements. Molar mass…

Q: Consider the following reaction N2 (g) + 3H2 (g) ? 2NH3 g If 1.10 x 10 g N2 is reacted with 500 x 10…

A: The given reaction is, N2 (g) + 3H2 (g) →2NH3 (g) Given that: mass of N2 = 1.10×103 g mass of H2 =…

Q: Flake white was a white pigment used by Renaissance artists, which was composed of a combination of…

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Q: Natural rubidium has the average mass of 85.4678 u and is composed of isotopes85Rb (mass = 84.9117…

A: Mass of the Rb = 86.913 amu. Given data: 85.4678 amu is average mass of the Rb Mass of 85Rb =…

Q: Give the formulas of the compounds in each set: (a) lead(II)oxide and lead(IV) oxide; (b) lithium…

A: Introduction- Chemical formula is the scientific symbol of the names of the compounds that are…

Q: Calculate the mass, in grams, of 602 atoms of cesium, Cs (1 mol of Cs has a mass of 132.91 g).

A: Given information: 602 atoms

Q: the formula for this batch of Epsom salts?

A: Mass percent of water in Epsom salt = 100 x Mass of water/Mass of Epsom salt Mass of Epsom salt =…

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: A 2.58 g sample of a compound consisting of carbon, hydrogen, oxygen, nitrogen, and sulfur was…

A:

Q: butane (C4H10) is combusted in the presence of oxygen.  carbon dioxide and water are produced. if…

A: Given - Weight of butane =150g Weight of carbon dioxide=?

Q: 8- Bromine (Br) has two isotopes, with masses of 78.92 and 80.92 amu. The natural abundance of the…

A:

Q: Octane (C8H18), a component of gasoline, reacts with oxygen to form carbon dioxide and water. Write…

A: Octane C8H18 on  reaction with oxygen O2 produces carbon dioxideCO2 and waterH2O.The balanced…

Q: Carbon and oxygen form no fewer than five different binary compounds. The mass percentages of carbon…

A: All five compounds are made up of Carbon and Oxygen. As the percentage mass of Carbon of the five…

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.