A mole of a substance is defined as the amount of substance contained in 12 grams of carbon the amount of substance in 16 grams of oxygen the number of atoms in 12 grams of carbon-14 the amount of substance that contains as many particles as there are in 12 grams of the C-12 isotope

Q: A compound composed of lodine, Carbon, Hydrogen, and Oxygen has the following composition by mass:…

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Q: The ratio of each element's mass in a compound changes when the size of the sample changes.

A: In this question we have to tell that above statement is true or false with explanation.

Q: etermine the number of atoms in 37.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Mass of sodium =37.0g Atomic mass of sodium = 22.99g/mol Moles of sodium = 37.0g/22.99g/mol = 1.61…

Q: The following equations represent chemical reactions. Chemical Reactions 1 2Na + 2H2O 2 H2 + O2 +…

A: The reaction which is blance follows law of conservation of mass i.e total mass remains same or…

Q: What is the mass of one-half mole of SO2? a. 8 g b. 12 g c. 24 g d. 32 g How many grams are there in…

A: (15) The mass and moles of the substance are related to each other as;         Moles =MassMolar mass…

Q: Determine the number of atoms in 55.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Here given, the mass of one mole of sodium is 22.99 g. So, in 55 grams of sodium, there are…

Q: How many carbon atoms are in 8.94 mL of C3H6O? 1 mole 6.02 x 1023 atoms 1 mL = %3D 0.883 g atoms of…

A: Calculation of mass in 8.94 mL: 1 mL=0.883 g8.94 mL=0.883 g1 mL×8.94 mL=7.894 g

Q: Glucose is a carbohydrate that contains carbon, hydrogen, and oxygen. The empirical formula of…

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Q: How many GRAMS of sulfur hexafluoride are present in 9.83×1022 molecules of this compound ?

A: Given : Compound is sulfur hexafluoride i.e SF6. And number of molecules of SF6 = 9.83 X 1022…

Q: How many moles of silver atoms are there in 1.80 x 104 atoms of silver? O 3.30 x 103 moles O 3.00 x…

A: The given data contains, number of atoms = 1.80×1020.

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

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Q: Potassium dichromate, K2Cr2O7, is used in tanning leather, decorating porcelain, and waterproofing…

A: Given: Mass of K2Cr2O7 = 43.06 g.

Q: Which of these statements is FALSE about the mole? O a. 1 mole is equal to 6.022 x 10 23…

A: Since you gave posted multiple questions, we are entitled to answer the first only.

Q: Arsenic is a natural semi-metallic chemical that is found all over the world in groundwater.…

A: A question based on mole concept that is to be accomplished.

Q: How many ATOMS of nitrogen

A: 1 mole of dinitrogen monoxide (N2O) contains 2 Nitrogen atoms and 1 Oxygen atom.

Q: Calculate the mass of 1 mole of the following compounds (round each elements to nearest 0.5 AMU,…

A: The molar mass of the elements rounded off is as follows:- Ca - 40.078 = 40 Br - 79.904 = 80 Fe -…

Q: One mole of oxygen molecule (O2) contains how many atoms of oxygen? O a. 6.022 x 1023 O b. 6.022 x…

A: Applying concept of moles and avogadro number.

Q: how many  atoms of carbon in 12.77 g manganese (III) oxalate.

A: Molecular formula of Manganese oxalate is C2H2MnO4 . 1 molecule of manganese oxalate contains 2…

Q: How many oxygen atoms are there in a single formula unit of Al2(SO4)3?

A: 1 molecule of given molecule is made up of 2 Al3+ and 3 SO42- units.

Q: The number of ammonia (NH3) molecules present in 4.85 grams of NH3is: a.1.02 x 10^25 c. 1.72 x…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: A compound contains C, H and O. The compound is 49.31 % by mass carbon, 43.79 % by mass oxygen with…

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

Q: What is the empirical formula of an unknown compound that contains 48.02% Carbon, 18.74% hydrogen,…

A: The simple number of atoms present in the molecule is shown below.

Q: Calculate the molecular formulas of the compounds having the following empirical formulas and molar…

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Q: A mixture contains 78% apatite (Ca3(PO4)2 . CaF2). The rest of the mixture does not contain…

A: Given: Mass percent of Ca3(PO4)2.CaF2 = 78% And there is no P in the mixture apart from that in the…

Q: A compound is composed of 57.51 % carbon, 1.63% H, 18.89% N, 13.05 % O, and the remainder other…

A: Given , A compound contains 57.51 % carbon , 1.63 % H , 18.89 % N , 13.05 % O and remainder are…

Q: The true value of a compound’s molar mass is 176.082 g/mol. You do an experiment and determine the…

A: True value of molar mass = 176.082 g/mol Experimental value of molar mass = 177.85 g/mol. % error =…

Q: How many grams are contained in one equivalent of iron (iii) ion, Fe3+? A) 167.6g B) 55.85g C)…

A: The mass of iron present in one equivalent of iron (iii) ion, Fe3+ is calculated as,

Q: Use the LAW OF CONSERVATION OF MASS to fill out the missing information in the table below HCI +…

A: Given that : We have to use the law of conservation of mass to calculate the mass of NaOH :

Q: A certain compound X is composed of 70.53% carbon, 13.02% hydrogen, and the remainder is nitrogen.…

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Q: Determine the number of atoms in a piece of silicon that has a mass of 15.0 grams. O 1.13 x 1024…

A: *** { note :- as per guidelines only one question will be answered. Please repost remaining…

Q: A compound is 21.20%Nitrogen,6.06% Hydrogen,24.30% sulfur and 48.5% oxygen

A: First of all, we will understand the difference between empirical and molecular formula. Empirical…

Q: How many hydrogen atoms are there in the following molecules? 1 molecule of C6H12O6 2 molecules of…

A: In the molecular formula, the subscript written next to the atom represents the number of that atom…

Q: Using the following equation: Fe:O:(s) + 3H:(g) → 2Fe(s) + 3H:O(1) How many grams of iron,Fe, can be…

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Q: How many moles of atoms are contained in the following? (d) 14.8 g CH3OH (e) 2.88 g Na2SO4…

A: Given: mass of CH3OH = 14.8 g mass of Na2SO4 = 2.88 g mass of ZnI2 = 4.20 lb = 1905.09g molar mass…

Q: How many atoms of neon are present in 1.45 moles of neon? 8.73 x 1024 atoms 8.73 x 1023 atoms 6.02 x…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: Determine the number of atoms in 41.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Given: Mass of sodium 41.0 g            Mass of one mole of sodium is 22.99 g/mol First divide the…

Q: 1. How many MOLES of carbon monoxide are present in 2.76 grams of this compound ? moles. 2. How many…

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Q: The Avogadro number is defined as A The number of electron in 12g of C-12 substance B The number of…

A: The question is based on the concept of avogadro  number. we have to correctly identify the…

Q: Write the empirical formula for each of the following compounds Part A. C4H10O4, erythritol, a…

A: Empirical formula of a compound represents the simplest ratio of the elements present in the…

Q: Calculate the percent by mass of each element in the following compounds: Calculate the mass percent…

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Q: Chemical formulas can be written as empirical formulas, molecular formulas, or structural formulas.…

A: Given: An Empirical formula gives the simplest, whole-number ratio of atoms in a compound. A…

Q: The Cullinan diamond was the largest natural diamond ever found (January 25, 1905). It weighed 3104…

A: 6.023× 10^23 is called Avogadro's number. 1 mole of any substance contains Avogadro's number of…

Q: 9. What is the mass of one-half mole of SO2? а. 8 g с. 24 g b. 12 g d. 32 g 10. How many grams are…

A: We know ; Mole of compound =  Mass of compound/ Molar mass of compound     1 mole of substance has…

Q: How many phosphate ions are there in 5.65 mg of Ca;(PO)2 (MM= 310 g/mol) O 1.03x1020 ions O 1.18x102…

A: Number of moles of a substance is equal to the mass of substance divided by its molar mass. Write…

Q: How many atoms are in 75.8 grams of Fe?

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Q: TRUE or FALSE A mole is the amount of a substance that contains as many elemental entities as…

A: Ans. TRUE The value of the mole is equal to the number of atoms in exactly 12 grams of pure…

Q: How many atoms of Mg are present in 97.22 grams of Mg?  6.022 × 1023  2.408 × 1024  4.818 × 1024…

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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.