A sample of 7.2 moles of the ionic compound, potassium dichromate, K2Cr2O7, is present. How many K+ ions are there?

Q: A.How many moles of boron trichloride are present in 1.03 x 10^23 molecules of this compound? B.How…

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

Q: How many atoms of hydrogen are in a sample of glucose (C6H12O6 molecular mass = 180.12 amu/molecule)…

A: A sample of glucose is considered. The number of atoms of hydrogen present in the sample can be…

Q: Ibuprofen, C13H18O2, is a covalent compound and the active ingredient in several popular…

A:

Q: What kind of chemical formula can be obtained from experimental data showing the relative masses of…

A: The formula obtained is:

Q: How many atoms of hydrogen are there in NH4+?

A: Given-> (NH4)^+

Q: How many atoms of carbon are combined with 7.70 moles of hydrogen atoms in a sample of the compound…

A: C2H6 From this Molecule we get that ; 1 mol C2H6 contain ; 2 mol Carbon and 6 mol Hydrogen    We can…

Q: Which kind of chemical formula can be obtained from experimental data showing the relative masses of…

A:

Q: How many carbon atoms are there in 9.50 g Na2C2O4?

A: It is known that 1 mole of a substance is equal to 6.022×1023 atoms. The given compound is…

Q: How many moles of carbon tetrabromide are present in 4.07 x 1022 molecules of this compound?

A:

Q: 2. How many H atoms are in 72.5 g of isopropanol (rubbing alcohol), C3H8O?

A:

Q: Acetaminophen, C8H9NO2, is a covalent compound and the active ingredient in several popular…

A: The formula of the compound Acetaminophen is C8H9NO2. Hence each molecule of C8H9NO2 contains 1) 8…

Q: Without doing any calculations, determine which element in each of the compounds will have the…

A: The mass percent is the ratio of mass of a component to the total mass of the compound, which is…

Q: The molecular formula for benzene is C6H6. What is its empirical formula?

A: We have to predict the empirical formula of benzene.

Q: 2. What is the empirical formula for each of the following compounds? a. N,O4 b. H2SO4 c. C6H6

A: According to Bartleby Guideline I can answer only first one so I am answering first one of these two…

Q: How many atoms of carbon are combined with 6.89 moles of hydrogen atoms in a sample of the compound…

A: In ethane C2H6 , 2 moles of carbon are combined with 6 moles of hydrogen.

Q: How many oxygen atoms are there in 50 g of sucrose (C12H22O11).

A: Mass of sucrose = 50 g  Formula of sucrose = C12H22O11

Q: a) How many calcium ions are there in 2.81 mol Ca3N2? b) How many nitride ions are there in 2.81…

A: A. We have to calculate the number of Ca+2 ions. B. We have to calculate the number of N3- ions.

Q: A.How many moles of boron tribromide are present in 5.93 x 10^22 molecules of this compound?…

A: The molar mass of bromine tribromide  (BBr3) is 250.52 g/mol .

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17 H22 CINO4, of mass 25.5 mg…

A:

Q: Vitamin E has the chemical formula C29H50O2. How many hydrogen atoms are in one molecule of vitamin…

A: The chemical formula of Vitamin E is given as C29H50O2.

Q: 5. How many carbon atoms are in one mole of C6H1206?

A: Note : As per our guidelines we are supposed to answer first question. Please repost the other…

Q: How many moles of sodium (Na) are in 1.75×1024 Na1.75×1024 Na atoms?

A: Number of moles is calculated using formula,

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: How many oxygen atoms are in 33 molecules of dinitrogen tetroxide, N₂O₄?

A: How many oxygen atoms are in 33 molecules of dinitrogen tetroxide, N₂O₄?

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17H22ClNO4, of mass 22.0 mg.

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

Q: A sample of hydrocarbon on complete combustion gave 1.32 g of carbon dioxide and 0.72 g of water.…

A: Since we know that on complete combustion of of any hydrocarbon it produces H2O and CO2 . To solve…

Q: The weed killer “Roundup” has a chemical formula of ( C3H8NO5P) What is its molecular mass?

A: The overall mass of one molecule of a substance is generally known as molecular mass (or molar…

Q: How many atoms of carbon are combined with 7.31 moles of hydrogen atoms in a sample of the compound…

A: Given : number of moles of hydrogen atoms in a sample of heptane = 7.31 mol  To calculate : number…

Q: 3. How many atoms are in 3.56 moles of copper?

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

Q: 2. How many ions of metal are in 5 molecules of NasPO4? How many atoms of metal?

A: Metals: Elements which can donate electrons easily are called as metals. Metals are good conductor…

Q: A sample of glucose, C6H12O6, contains 1.240×1021 carbon atoms. How many atoms of hydrogen does it…

A:

Q: What is the % composition of Oxygen in Ammonium sulfate, (NH₄)₂SO₄ ?

A:

Q: The number of nonmetallic atoms in Al2 (SO3 )3 is?

A: The given compound is Al2(SO3)3. In periodic table right end elements are non metals and left end…

Q: an oxide of iron has the formula Fe3O4. what mass percent of iron does it contain?

A: Molar mass of Fe = 55.845 g/mol.Molar mass of O = 15.999 g/mol.

Q: How many atoms of O there in 24.7 grams of Al(C2H3O2)3?

A: Here structure of the compound is AlC2H3O23 Molar mass of the compound = 27+32×12+1×3+2×16gmol =…

Q: Calculate the exact masses of the ions C5H8O1 and C6H12 1, both of which have a nominal mass of 84.…

A: The organic compounds can be identified by various characterisation techniques. For example, NMR,…

Q: A sample of C3H8 has 8.00×10^24 H atoms. How many carbon atoms does the sample contain?  What is…

A: Given :- number of H atoms = 8.00 × 1024 atoms  To be calculated :-  No. of C atoms in sample…

Q: How many moles of NF3 contain 2.55 x 1024 fluorine atoms?

A: We have to calculate the moles of NF3.

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: We have a sample of 7.2 moles of the ionic compound, potassium dichromate, K2Cr2O7. How many Cr…

A: Given that , No. Of moles of K2Cr2O7 = 7.2 moles We will calculate the no. Of atoms of Cr as…

Q: A 0.415 mol sample of MnX2O7 has mass of 85.14g identify X indicating the symbol and not the name of…

A:

Q: A 1.512-gram sample of aluminum metal was burned in the presence of oxygen gas, forming 2.857 grams…

A: Given,  1.512 g of Aluminium burns in oxygen gas to give 2.857g of binary oxide.

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17H22ClNO4, of mass 23.5 mg.

A: Given, Mass of cocaine hydrochloride, C17H22ClNO4 = 23.5 mg Number of moles is the total mass of…

Q: 2. How many ions of metal are in 5 molecules of Na;PO4? How many atoms of metal?

A: Answer:- This question is answered by using the simple concept of calculation of number of atoms in…

Q: B. Determine the empirical formula of the following compounds: 1. CH, 4. CH,COОН 2. CH12O6 5. Al,03…

A: Empirical formula is the formula that shows the elements in a compound in the lowest whole number…

Q: How many Hydrogen atoms are there in 2.5 moles of H2SO4

A: Given 2.5 moles of H2SO4

Q: A.How many moles of boron tribromide,BBr3,are present in 3.15 grams of this compound? B.How many…

A:

Q: How many H atoms are there in 40 molecules of C6H6?

A: Given that, 40 molecules of C6H6

Q: How many of the indicated atoms are represented by eachchemical formula: (a) carbon atoms in…

A: The number of indicated atoms present in each chemical formula are:

Q: 1. Calculate the number of grams in one mole of CaSO-7H2O ? (Atomic weight Ca-40 ,S=32 ,O=16 ,H=1).

A:

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.