Q: To three significant digits, what is the mass percentage of iron in the compound Fe2O3?

A: Molar mass of Fe = 55.85g/mol Molar mass of O = 16g/mol Molar mass of Fe₂O₃ = 2(55.85) + 3(16) =…

Q: in 4.95g of nickel

A:

Q: What is the empirical formula of C4H7N? Explain how you know.

A: Chemical formula tells us how many atoms of each element present in compound. Empirical formula…

Q: How many total atoms are in 0.690 g of P2O5?

A: Calculate the moles of P2O5 Moles = grams / molarmas

Q: How many moles of chlorine are there in 0.21 moles of CCl3F?

A: Given: The moles of CCl3F = 0.21 mol One mole of CCl3F has 3 moles of Cl atoms.

Q: How many moles of hydrogen are in 3.06 x 10-3 g of glycine, C2H5NO2 ?

A: Moles of glycrine = given mass of glycrineMolar mass of glycrineMolar mass of glycrine (C2H5NO2) is…

Q: How many atoms of oxygen are in 10.20 mol of tetrathionate (S4O62-)ion?

A: We have determine how many oxygen atoms are present in 10.20mol of tetrathionate.   Calculation is…

Q: Determine the number of atoms of O 10.0 of CO2.

A: Since each molecule of CO2 has 1 atom of C and 2 atoms of O  Hence each molecule has total number of…

Q: how many hydrogen atoms are in 0.0948 g of C3H7OH

A: Molar mass of a particular compound is the sum of atomic masses of constituent elements. Moles of…

Q: How many hydrogen atoms are in 0.1488g of phosphoric acid, H3PO4?

A:

Q: What is the mass of 0.0656 mol of PbCI2?

A: Interpretation: The mass of 0.0656 mol of PbCl2 is to be calculated.

Q: What is the number of nitrogen atoms in 5.360 g of ammonium sulfate?

A:

Q: Calculate the following: How many atoms of oxygen are in 1.0 moles of calcium sulfate Ca(SO4) ?

A:

Q: How many moles are equal to 2.4x1024 atoms of Cu¿

A: A mole is basic unit of ion or particle or atom here we are required to find the moles which contain…

Q: How many molecules of C2H4 are in 15.0 g of this compound?

A: The molecular formula of compound is C2H4. The amount of compound is 15.0 g.

Q: How many moles of sodium carbonate contain 1.773 × 1017 carbon atoms?

A:

Q: What is the mass percent of iron in iron(II) oxalate, FeC2O4?

A: From the molecular formula we can get the molar mass from there we can get the weight of the…

Q: How many hydrogen atoms are present in 75.0 of g H2O?

A: Mass of water, H2O = 18.016 g/mol Mass of water = 75 g Moles of water, H2O = Mass Molar mass=75…

Q: What is the mass of 0.150 mol of Na2SO4?

A: Number of moles  = Mass (g)/ Molar mass(g/mol) Molar mass of Na2SO4 = 142 g/mol

Q: Write the formula and name between Iron (III) and workate and determine the type of the molecule…

A: A compound is formed by the electrostatic interaction between the cation and the anion. The cation…

Q: how many oxygen atoms are there in 45.0g CO2?

A: 1 molecule of CO2 contains 2 oxygen atoms. Hence, 1 mole of CO2 should contain 2 moles of oxygen…

Q: Calculate the mass, in grams, of  0.607  mol of hydrogen peroxide,  H2O2 . mass of  H2O2:

A:

Q: A compound with an empirical formula of C2H8N and a molar mass of 46 grams per mole. What is the…

A: Given that : The empirical formula of the compound = C2H8N The molar mass of the compound = 46 g/mol…

Q: 1) How many moles of FeS2 are in 632 g of iron pyrite, FeS2?

A: Given mass of FeS2 = 632 g

Q: Calculate the number of O atoms in 0.00963 g of CaSO4 · 2H2O.

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

Q: How many hydrogen atoms are in 0.1488 g of phosphoric acid, H3PO4?

A: Number of moles=Given massMolar massGiven mass of Phosphoric acid=0.1488 gMolar mass of Phosphoric…

Q: How many hydrogen atoms are in 0.1488 g of phosphoric acid , H3PO4?

A: Given : mass of H3PO4 = 0.1488 g Molar mass of H3PO4 = Atomic mass of H X 3 + Atomic mass of P +…

Q: how many hydrogen atoms are in 0.1488g of phosphoric acid, H3PO4?

A: Given, amount of H3PO4 =0.1488 gramwe are asked to calculate the number of atoms of hydrogen in the…

Q: Calculate the number of grams in 0.348 mol of galactose, C6H12O6

A: Given, The number of moles of galactose is 0.348 mol. The molar mass of galactose is 180.156 g/mol

Q: A sample of 7.2 moles of the ionic compound, potassium dichromate, K2Cr2O7, is present. How many K+…

A: Applying concept of avogadro number. 1 mole = 6.022× 1023 atom/ molecules/ ions

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: How do you calculate the number of N atoms in 25.0 g of C7H5N3O6?

A: Given, Mass of TNT = 25g

Q: How many atoms of silicon are in 0.75 mol of disilicon hexahydride, Si2H6?

A: Moles of Si2H6 = 0.75 mol No. of atoms of Si in Si2H6 = ?

Q: how many molecules are there in 1×10^-4 mole of benzene C6H6?

A: Given that, Number of moles of benzene = 1.0×10-4 moles

Q: How many moles of hydrogen are in 3.06 x 103g of glycine , C2H5NO2?

A:

Q: How many atoms of O are in 3.00 mol of N2O4?

A: Use formula Total molecule=mole×6×1022 Total Atoms=atomicity×molecule Atomicity=total no of atoms…

Q: How many molecules are in 363 g of CBr4?

A: Mass of CBr4 = 363 g Molar mass of CBr4 molecule =  331.63 g/mol

Q: How many atoms of hydrogen are in 230  g of hydrogen peroxide ( H2O2)?

A:

Q: How many moles of hydrogen are in 3.06 x 10^-3g of glycine, C2H5NO2?

A: The concentration of any substance can be expressed in different ways such as molality, molarity,…

Q: What is the empirical formula for C4H8?

A: Given, C4H8   An empirical formula is defined as the simplest or most reduced whole number ratio of…

Q: How many moles of Sodium thiosulfate, Na2S2O3, are present in 31.7 g of Sodium thiosulfate?

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

Q: How many nitrogen atoms are present in 0.150 mol of Zn(NO3)2?

A: Since in each molecule of  Zn(NO3)2 we have 2 atoms of N Hence in 1 mole of Zn(NO3)2 we will have 2…

Q: How many total atoms are in a 0.400 g of P2O5?

A: Given, 0.400 g of P2O5

Q: How many total atoms are in 0.750 g0.750 g of P2O5?

A: Given: Mass of P2O5 = 0.750 g Molar mass of P2O5 = 283.886 g/mol

Q: 5) How many molecules are in 2.9 mol of C7H5N3O6?

A: applying concept of Avogadro concept of molecules calculation

Q: Calculate the number of atoms in 0.0015 moles of Cu.

A:

Q: What is the molar mass of ammonium phosphate, whose chemical formula is (NH4)3PO4?

A: Molar mass of any compound = atomic mass of all the atoms present in the chemical formula  Since in…

Q: How many iron atoms are in 5.6 mol of Fe2O3?

A:

Q: What is the percent composition of iron in the compound Fe2O3?

A: Since we know that precent composition of any element in a compound is calculated as  Percent…

Q: How many total atoms are in 0.550 g of P2O5?

A: Given: Molecular formula of phosphorus pentaoxide is P2O5. Mass of P2O5 =0.550 g Number of atoms in…

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.