The formula weight of potassium dichromate (K2Cr2O7) is __________ amu.

Q: Determine thev molar masses of these compounds  d)C2H5OH e) HC2H3O2 F) Fe3O4

A: Note : As per our guidelines we are supposed to answer first 3 parts. Please repost other parts as…

Q: How many atoms of C are in a sample 1.0 mol sample of C7H16C7H16? 9.73⋅10249.73⋅1024…

A: We have asked for the number of carbon atoms in 1 mole of C7H16

Q: A250 mg sample of a compound containing carbon hydrogen, and oxygen underwent combustion producing…

A: Since you have posted multiple questions, we are entitled to answer the first only. a) Given: mass…

Q: Please provide all the work in detail because I will be using this to study

A: Amount of C = 0.532 g Number of mol of C = given mass / molar mass = 0.532 g / 12.011 g/mol = 0.044…

Q: Which one of the following statements about oxalic acid is TRUE? Select one: O a. One mole of oxalic…

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Q: Complete the table MOLAR REPRESENTATIVE NO. OF NO. OF SUBSTANCE MASS (g) MASS PARTICLE MOLES…

A: Carbon dioxide , Molar mass =  44.01  Representative particle :- Molecule Number of moles = 2.5…

Q: What is the empirical formula for perfluoropropane if the compound contains 81% fluorine and 19%…

A: Empirical formula of a chemical compound is that chemical formula which represents the simplest…

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: Note : As per our guidelines we are supposed to answer one question .please resubmit the other…

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: First calculate percentage ratio  of mole then form formula

Q: 3.121 Avogadro’s number has sometimes been described as aconversion factor between amu and grams.…

A:

Q: Rubbing Alcohol was found to contain 60.0% carbon, 13.4% hydrogen, and the remaining mass was due to…

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

Q: Compute the formula mass/Molecular mass of the following: 1. Sodium Hydroxide 2. Sulphuric Acid

A: Molecular mass is the sum of masses of all constituent atoms in that molecule eg. In NaOH the…

Q: How many formula units of zinc selenide are there in 2.9x10^-3 moles of zinc selenide? Round to…

A: The formula unit is used to express the smallest ratio that exists between the cations and anions in…

Q: What is the formula mass of H2SO4?

A: The formula mass of H2SO4 is to be calculated.

Q: 1, A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: From percentage composition by calculating no. Of moles we can calculate empirical formula .

Q: For a sample of Carbon that contains 2.41 x 1022 atoms, calculate: • number of moles of carbon in…

A: Introduction: Mole is the amount of substance that contains 6.022×1023 respective particles of that…

Q: A compound was analyzed and found to contain 52.17% C, 13.13% H and 34.78% O. What is the empirical…

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Q: How many particles of Glucose (C6H1206) are in a 0.25g sample. Round periodic table average atomic…

A: Given, Mass of glucose sample = 0.25 g Chemical formula of glucose = C6H12O6 Molecules or particles…

Q: Which one of the folllowing samples contains the most atoms? Hint. Think about definitions:I am…

A: Which one of the following samples contains the most atoms?

Q: how many moles (of molecules or formula units) are in each sample? express your answer to four sig…

A: We know , number  of moles in any species/compound is given as : =mass of given…

Q: Complete the table of compounds that contain only manganese and oxygen. Molar Mass % Mn % O (by (by…

A: Manganese(III)oxide  Formula – Mn2O3 Molar mass of MnO  = 2 × Atomic mass of Mn + 3 × Atomic mass of…

Q: A mystery compound has 56.6 % Potassium. 8.7 % Carbon and 34.7% Oxygen?  What is the empirical…

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Q: How many Chromium atoms are present in a 5.00 mole ?sample of Al2(Cr207)3 None of them x 1024 9.03 x…

A: We have given that 1 mole of Al2(Cr2O7)3 contain 6 mole of chromium  Avogadro's number is defined as…

Q: How many N atoms in a sample of C7H5(NO2)3 that has the same number of O atoms as 13.0 g C6H12O6?

A: Solution stoichiometry is mainly based on the calculation of moles and volumes. These two values are…

Q: What is the molecular formula of a compound if the empirical formula is C,H, and the approximate…

A: Molecular formula: In a molecular formula we describe the number of atoms of all the elements…

Q: how would you figure this out?BINARY COMPOUNDS T01/S04A compound containing only carbon and oxygen…

A: Determination of empirican formula pf a compound from percentageGiven here, binary compound of C and…

Q: m ni un f. a 65.2 g sample of à compoulnu 11. A substance whose formula is A20 (A is a mystery…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: 9. Using the following reaction 2NaBr +CaF, →2NAF+ CaBr2 If 6 moles of CaF2 were added, what mass of…

A: Given  moles of CaF2 = 6 moles Molar mass of  CaBr2 = 199.9 gm/mole Mass of CaBr2= ?

Q: What is the empirical formula of a compound that contains 72.0% carbon 12.0% hydrogen and 16.0%…

A: We have given percentage of carbon, Hydrogen and oxygen. We have to predict the empirical formula of…

Q: The molecular formula of Acetic Acid is HC2H3O2. What is the empirical formula? СНО CH20 HC2H3O2…

A: • Empirical formula represents the simplest whole number ratio of atoms of different elements…

Q: Please provide all the work in detail because I will be using this to study

A: Consider the mass of compound is one gram.  The percent of each element is converted to grams as,

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17H22CINO4, of mass 23.5 mg.

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

Q: A given sample of Xenon flouride compound contains molecules of the same type XeFn where n is some…

A: Chemical formula which shows number of chemical elements and total element’s number available in…

Q: Which compounds could be represented by the empirical formula CH2 ? Select one or more: O C2H4 O…

A: Here we have to find out the compounds given  below which have  empirical formula CH2.

Q: Q7. How many moles of oxygen atoms are there in 3.0 moles of Caz(P A. 2.0 C. 4.0 B. 8.0 Q8. Which…

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Q: 17) An unknown hydrocarbon compound was analyzed for hydrogen by elemental analysis and results show…

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Q: A compound is analyzed and found to contain 86.55% boron and 13.45% hydrogen by mass. What is the…

A: Given, Boron contains 86.55% and hydrogen contains 13.45% by mass. Molar mass of Boron B = 10.811…

Q: 1.50 g Lithium Carbonate to atoms O 9.09 x 10*23 atoms O 7.12 x 10°23 atoms 8.06 x 10*23 atoms O…

A: Lithium carbonate is a chemical salt, a lithium carbonate salt with the Li2CO3 formula. This white…

Q: 23 - Determine the molecular fomula of a compound that has a molar mass of 183 g/mol and an…

A: This question is straight forward We know that molecular formula is whole number multiple of…

Q: The compound benzene contains 92.26% C, the remain is hydrogen and has molar mass of 78 g/mol. what…

A: Given    C = 92.26 %    H   = (100 - 92.26) %         = 7.74 %  Molar mass of Compound = 78…

Q: Which of the following is not an empirical formula C2H6 C2H CH3 CH

A: We are having the four different formulas of certain compound. We have to see which formula is not…

Q: How many moles of calcium atoms do you have if you have 8.20 * 10 ^ 21 atoms of calcium. (The mass…

A: In 1 Mole of any substance, we have 6.023*1023 atoms of that substance.

Q: 2a Calculate the formula mass of Mga(PO.)2 2b Use dimensional analysis to convert 1.75 mol Mgs(PO4),…

A: Formula mass of Mg3(PO4) 2 = 3 ( Atomic mass of Mg) + 2 ( Atomic mass of P + 4(Atomic mass of O) )…

Q: 1. How many ATOM nitrogen trifluoride atoms c

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Q: 4. Cane sugar (C12H22011) is a white, odorless, crystalline powder with a sweet taste. What is the…

A: Since you have posted multiple questions as per guidelines we can answer only one per session . If…

Q: Two moles of (NH4)2Fe(SO4)2-6H20 contains O a. 8 O b.4 moles of sulfur atoms. O d. 6 O e. 2

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Q: R Compound X has a molar mass of 102.17 g mol -1 and the following composition: element mass %…

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Q: Rubbing alcohol was found to contain 60.0 % carbon, 13.4 % hydrogen, and the remaining mass was due…

A: We have 60% C, 13.4% of H and rest as O. We have to calculate the empirical formula.

Q: A compound of iron and oxygen is analyzed and found to contain 69.94% iron and 30.06% oxygen. Find…

A: Let there is 100 g of compound. So Iron is 69.94 g and Oxygen is 30.06 g. Now first calculate the…

Q: All of the following are empirical formulas of compounds EXCEPT- C3HB- O CH2O. O CH4S. O C,H1206

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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.