What is the difference between the molar mass and empirical formula mass of a compound? When are these masses the same and when they are different? When different, how is the molar mass related to the empirical formula mass?

Q: A compound is 19.3% sodium, 26.9% sulfur, and 53.8% oxygen. Its formula mass is 238.00 g. What is…

A: The number of moles for a given chemical species refers to the ratio of mass of the species to that…

Q: A particular protein sample is found to have 1 atom of iron in its chemical formula. If the mass…

A: Mass percent expresses the solute concentration in any mixture. The division of weight of dissolved…

Q: It is estimated that we breathe around 5.0 x 1021 molecules of 0, in a single breath. What mass of…

A: Given: Molecules of O2 in a single breath = 5.0 × 1021. Molar mass of O2 = 32 g/mol

Q: 77. A binary compound of boron and hydrogen has the following percentage composition: 78.14% boron,…

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

Q: A beaker contains 5.75 x 1024 molecules of ethanol. How many moles of ethanol are there in a beaker?

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Q: How many molecules are in 156 g of aluminum sulfate? 1. 2. What is the mass of 5.36 x 102² molecules…

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Q: A compound was found to have the following composition by mass: 28.03% Mg, 21.60% Si, 1.16% H, and…

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Q: Calculate the mass of 1.40 ✕ 1024 molecules of SO3. Use a molar mass with at least as many…

A: Given: The number of molecules of SO3 is 1.40 X 1024.

Q: Freon-12 (CC12F2) is used as a refrigerant in air conditioners and as a propellant in aerosol cans.…

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Q: Combustion analysis of a hydrocarbon produced 33.01 g CO2 and 13.51 g H2O. Calculate the empirical…

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Q: An antifreeze and coolant widely used in automobile engines is 38.7% carbon, 9.7% hydrogen, and…

A: Given: antifreeze and coolant widely used in automobile engines is: 38.7% carbon 9.7% hydrogen…

Q: A compound was found have the following mass percentages; C 39.99%, H 6.73%, Oxygen 53.28%. What is…

A: The question is based on the concept of stoichiometry.Based on mass percentage provided, we need to…

Q: A block of pure magnesium metal weighs 76.9 grams. How many moles of magnesium are present in the…

A: Mole= mass of Mg / molar mass of Mg Given - 1) mass of Mg =76.9              2) Molar mass of Mg=…

Q: step 4 Dichlorine heptoxide (C1207)(C1207) is a highly reactive compound used in some organic…

A: Given that -  Dichlorine heptoxide , Cl2O7 , which is a highly reactive compound.    The molar…

Q: How many grams would 71,934,010,495 atoms of a substance weigh if it has a molar mass of 23.7889…

A: Number of atoms = 71,934,010,495 atoms  6.02×1023 atoms = 1 mol 71,934,010,495 atoms =…

Q: A gaseous compound has the empirical formula NO2. If its molar mass is approximately 92 g/mol, what…

A: Empirical formula of compound: NO2Molar mass of compound = 92 g/molmolecular formula = ?Note:…

Q: A compound has a molar mass belween 165 - 170g. the percentage composition by mass values are…

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Q: In 1871, Mendeleev predicted the undiscovered element ekasilicon. In 1886, the element was…

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Q: Determine the percent composition by mass of acetaminophen, the active ingredient in…

A: The molecular formula of Acetominophen is C8H9NO2. The total mass of the given compound is,…

Q: A student weighs out 94.53 grams of sodium permanganate, NaMnO4.  How many moles of NaMnO4 is this?…

A: Moles— It is the ratio of given mass of a compound to its molar mass  Mole = given mass / molar mass…

Q: Cortisone consists of molecules, each of which contains 21 atoms of carbon (plus other atoms). The…

A: The given data: The number of carbon atoms present in cortisone = 21 The mass % of the carbon in…

Q: For each of the following drugs, determine the mass of compound present for the given moles of each…

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Q: Phosphorus pentachloride, PCIs, a white solid that has a pungent, unpleasant odor, is used as a…

A: mole is equal to weight of substance divide by it's molar mass

Q: Butanol is 64.81% carbon, 21.59% oxygen, and 13.60% hydrogen by mass. What is the molecular formula…

A: Given that the Butanol is 64.81% carbon, 21.59 % oxygen and 13.60 % hydrogen by mass. The molar mass…

Q: The chemical formula for the antidepressant fluoxetine is C₁₇H₁₈F₃NO. What is the mass in grams of…

A: Given data: The molecular formula of fluoxetine is C17H18F3NO. The given moles of fluoxetine is…

Q: Calculate the molar masses of the following molecules. Include the units. Use 4 significant figures.…

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Q: What is the molecular mass of a compound whose empirical formula is CH3 and there are 5 empirical…

A: The empirical formula of the compound is . There are 5 empirical formulas in the compound. Use this…

Q: compound is 92.2% Carbon and 7.76% Hydrogen. The formula mass of the compound is 78.1 g. Calculate…

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Q: A metal has the mass  of 12.00 g and 5.850 x 1022 atoms.  Calculate molar mass of the metal.

A: Formula use is, no of moles = weight/ molar mass

Q: you have 1.500 moles of an unknown metallic element. You go to the balance, and find that the mass…

A: Number of Moles of the Unknown Element = 1.500 moles Mass of the Element = 161.80 g   In order to…

Q: How many moles are represented by 3.65x10^34 molecules of water?

A: Given: molecules of water = 3.65×1034

Q: . He can tell from elemental analysis that the polymer is made up of only three elements: carbon,…

A: To solve this we have to consider the mass of polymer = 100.0g  Then  Mass of C = 56.45 g  Mass of H…

Q: Selenium dichloride, SeCl2, has a molar mass of 149.86 g/mol.  What is the mass in grams of 0.325…

A: Given, moles of SeCl2 = 0.325 moles molar mass of SeCl2 = 149.86 g/mol mass of SeCl2 = ?

Q: What is the molar mass of a compound that has 7 atoms of an element with molar mass 20.63 and 18…

A: 1 mole = 6.022×1023 (Avogadro's number)  The mass of 1 mole of molecules of a substance is called…

Q: A binary compound of boron and hydrogen has the following mass composition: 78.14% boron, 21.86%…

A: Determine how many grams of each element are present in  of compound. Given compound has  boron (by…

Q: What is the mass, in grams, of 9.32×1024 molecules9.32×1024 molecules of methanol (CH3OH)?

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Q: A compound with an empirical formula of C8H4NNaO4S is found to have a molar mass twice that of the…

A: Empirical formula :-  The formula which shows only relative number (simple ratio) of atoms of…

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.