A certain compound is composed of 26.57% potassium, 35.36% chromium and 38.07% oxygen.  Derive the empirical formula.  atomic masses: potassium - 39.09 g/mole chromium - 51.99 g/mole oxygen - 16.00 g/mole

Q: Folic Acid (C19 H19 N7 O6), also known as vitamin B9 is used to treat anemia caused by folic acid…

A: a) The number of moles of Vitamin B9 can be calculated as given below. Therefore, the number of…

Q: (a) H2 _?_ x1025 H atoms  (b) Ca(NO3)2 _?_ x1023 Ca2+ ions  _?_ x1024 NO3- ions  (c) N2O2 _?_ x 1024…

A: The mole is actually contains Avogadro’s number of particles in elements or compounds. Avogadro’s…

Q: Determine the number of moles (of molecules or formula units) in sample. 155.2 kg Na2SO4

A: Record the given data, The given mass of Na2SO4 is 155.2 kg which is converted to grams as 155.2 x…

Q: The ionic compound CaCO3 has a formula mass of   A. 50 g/mole   B. 50 amu   C. 100…

A: We Know that,      Molar mass of Ca = 40 amu.     Molar mass of O = 16 amu.     Molar mass of C = 12…

Q: Calculate the total number of N atoms in 23.8 g N2O5. O 2.65 x 1023 total N atoms O 9.31 x1023 total…

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Q: Write the empirical formula for each compound. a. Al2Cl6: b. K2Cr2O7: С. С2Н4: d. (NH2)2CNH: e.…

A: The simplest form where atoms ratio is present in whole numbers is called empirical formula.a.…

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: The compound whose molar mas is 212.4 is 1. CsBr 2. RbI 3. KF 4. CaF2

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

Q: Calculate the moles of Magnesium (Mg) present in 93.5 g of Mg?

A:

Q: Determine the molecular formula of a compound that has the following composition: 48.6% C, 8.2% H,…

A:

Q: an ingredient in some sunscreens is composed of carbon (61.31%), hydrogen (5.14%) nitrogen (10.21%)…

A: The sunscreens are composed of carbon, C = 61.31% hydrogen, H = 5.14% nitrogen, N = 10.21% oxygen, O…

Q: etermine the number of water molecules in 1.00 mole of water.   options:   3.00 × 10–23   none of…

A: The answer is given as follows The according to avogadro laws that one mole of any species contains…

Q: 8.95 x 1025 molecules of CCl4 to mol of CC14

A: Given that: Molecules of CCl4 = 8.95×1025 Mol of CCl4 =?

Q: . Calculate the molar mass of the following compounds: a. H2O b. CCl2F2 c. N2O

A: Mole concept: The number of molecules present in the one-mole sample is equal to the Avogadro number…

Q: Determine the number of moles of hydrogen atoms in sample. 0.0885 mol C4H10

A: The number of moles of an atom present in a molecule is given by the chemical formula.

Q: Calculate the number of oxygen atoms in 15.2 g of trinitrotoluene, C7H5(NO2)3(s).

A: The solution is given below -

Q: 16. A metal has the mass of 12.00 g and 5.850 x 1022 atoms. Calculate molar mass of the metal. O…

A:

Q: Find out the molar mass of Ca3(PO4)3. Select one: O 504 g/mole O 450 g/mole o 405g/mole O 430 g/mole

A: Atomic mass of calcium is 40 g/mole Atomic mass of oxygen is 16 g/mole Atomic mass of phosphorus is…

Q: The elemental mass percent composition of ascorbic acid (vitamin C) is 40.92% C, 4.58% H, and 54.50%…

A: For particular molecule, empirical formula reflects the most simplistic proportion which exists…

Q: Calculate the percent composition of sodium in borax ,Na2 B2 O7 used in commercial laundry process.…

A: The given data is as follows: The atomic mass of Na = 23 The atomic mass of B = 10.81  The atomic…

Q: How many grams of LizN can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6 Li (s) +…

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Q: Calculate the mass percent composition of carbon in carbon containing compound. C2H6

A: The compound given is C2H6  We find the molar mass of the compound:  = 2*12 + 6*1= 24 + 6 = 30 g/mol…

Q: calculate the number of moles of carbon atoms in 50.0g CS2

A: Mole Mole is a quantity that represents a collection of 6.022×1023 atoms or molecules. The term…

Q: Help me please

A: Number of moles of sulphuric acid = 8.21 moles. Number of molecules of sulphuric acid = ?

Q: Determine the number of atoms of O in 7.23 moles of Na₂SO₄.

A:

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

A:

Q: Combustion analysis of naphthalene, a hydrocarbon used in mothballs, produces 8.80 g CO2 and 1.44 g…

A: The ratio of the given mass to the molar mass is known as the number of moles. Mathematically,

Q: Moles and Chemical Formulas A. Finding the Simplest Formula 43.58 Oi 23 43.81 43.95 1. Mass of empty…

A: The relationship between moles, mass and molar mass is: Number of moles = Given massMolar mass

Q: Determine the empirical formula of each compound: C2H6, NO2, C6H12O6, C2H4O

A: In empirical formula the ratio of atoms in the compound should be lowest. Since in C2H6 the lowest…

Q: A compound of molar mass 229 contains only carbon, hydrogen, iodine, and sulfur. Analysis shows that…

A: The molar mass of a compound , is the sum of atomic masses of each element present in it. Molecular…

Q: Calculate the molecular formula of a compound that has an empirical formula of P2O5

A:

Q: Calculate the number of molecules in 18.5 grams of glucose, C6H12O6- O 5.05 x 1023 O 5.63 x 1022 O…

A: Number of moles of Glucose  = mass/molar mass = 18.5/180 = 0.1028 moles 1.0 mole of any substance…

Q: Determine the number of moles (of molecules or formula units) in each sample.a. 25.5 g NO2 b. 1.25…

A: Given samples,    a. 25.5 g NO2    b. 1.25 kg CO2    c. 38.2 g KNO3    d. 155.2 kg Na2SO4

Q: Determine the empirical formula of a compound having the following percent composition by mass: K:…

A:

Q: Determine the number of moles and molecules in 325 mg of C9H8O4

A: Given: Mass of C9H8O4 = 325 mg = 0.325 g Molar mass of C9H8O4 = 180.16 g/mol

Q: Calculate the number of moles of Cl atoms in 1.20×1024 formula units of magnesium chloride, MgCl2.

A: Here we have to calculate moles of Cl atoms in formula units of MgCl2Divide formula units by…

Q: Calculate the number of molecules in 4.08 moles of CCl4

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: Calculate the number of moles in 6.60x1015 atoms of 14c.

A: A mole is defined as 6.02 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. For…

Q: 1.) Calculate the moles of KHP in flask #1. grams KHP Molar Mass of KHP (A1) 204.22 g/mol moles KHP…

A:

Q: Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical…

A: Given: The molar mass of the given compound =183.2 g/mol The empirical formula of the given compound…

Q: What is the mass percent composition of Chromium (II) bromide? The molar mass of chromium is 52.00…

A: Given data The molar mass of chromium is 52.00 g/mole  and The molar mass of bromine is 79.90…

Q: 1. Calculate the molar mass of potassium chloride, KCI. A) 74.55 g/mole B) 54.55 g/mole C) 6.745…

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

Q: Complete the table below for calculating the molar mass of the ionic compound copper(II) bromide.…

A: The molar mass of an ionic compound is the sum of the mass of the constituting ions present in 1 mol…

Q: Calculate the number of SS atoms in 0.700 molemole of SS.

A: Given information:It is assumed that S represents Sulfur. Mole of S is 0.700 mol.

Q: Tartaric acid is the white, powdery substance that coats tart candies such as Sour Patch Kids.…

A: Given: Mass of CO2 = 14.08 g Mass of H2O = 4.32g Mass of tartaric acid = 12.01 g First calculate the…

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

A:

Q: Ibuprofen has the molecular formula C13H1802. The number of moles of carbon atoms in 0.0325 mole of…

A:

Q: What is the molar mass of the rocket propellant, CIF3? Remember to round your answer to the tenths…

A: To find the molar mass of compound , we have to take sum of all the masses of different elements…

Q: What is the percent composition by mass of nitrogen in a 52.2 g sample of trimethylenediamine,…

A: given Mass of sample = 52.2 g = mMolar mass of molecule = 74.13 g/mol = MMoles of triethylenediamine…

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.