1. An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of the compound by mass is composed of tellurium. The chemical formula of the compound is TeBr₄. What is the IUPAC name of the unknown compound? 2. How many atoms of zirconium are in 0.3521 mol of ZrSiO₄?   3. Determine the number of atoms of H in 37.7 grams of C₆H₁₂O₆.   4. Determine the number of atoms of O in 7.23 moles of Fe(NO₃)₃.   5. How many moles of calcium atoms do you have if you have 5.39 × 10²¹ atoms of calcium. (The mass of one mole of calcium is 40.08 g.)   6. Calculate the mass, in grams, of 502 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).   7. Determine the number of atoms in 45.0 grams of nickel, Ni. (The mass of one mole of nickel is 58.69 g.)   8. Determine the number of atoms in 15.0 grams of bromine, Br. (The mass of one mole of bromine is 79.90 g.)

Q: What is a possible molecular formula of a molecule with a molar mass of 120 g/mol and an empirical…

A:

Q: How many total atoms are in 0.680 g of P2O5?

A: This question is based upon  the mole concept.   Please find the below attachment.

Q: Sample When 3.596 grams of a hydrocarbon, C,Hy, were burned in a combustion analysis apparatus,…

A: CxHy + O2(excess) -----> x CO2 + y/2 H2O Where : x = number of carbon and y = number of Hydrogen…

Q: Find the molecular formula of a compound that contains 30.45% nitrogen and 69.55% oxygen. The molar…

A: Molecular formula of the constituent elements is written as chemical symbol of elements. The number…

Q: many molecules were used

A:

Q: 4. How many atoms of sulfur are in 10.18 mol of tetrathionate (S4O,2-) ion? O 2.451 x1025 atom O…

A: 1 mol of any substance contains avogadro number of atoms or ions. Avogadro's constant= 6.023× 10^ 23

Q: A student recorded that 61.64 g of carbon dioxide and 28.39 g of water were produced after the…

A: Here we are required to find the molecular formula of the compound.

Q: How many H2O molecules are in a sample of water with a mass of 4.53 g ?

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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: Ammonium phosphate NH43PO4 is an important ingredient in many fertilizers. It can be made by…

A: The given mass of ammonia = 7.5 gThe mass of ammonium phosphate produced = ?

Q: Regular treatment with low dose aspirin is used to help prevent cardiovascular disease. How many…

A: Given : The molecular formula of aspirin = C9H8O4  And the mass of aspirin = 160 mg  Since 1 mg =…

Q: The formula for rust can be represented by Fe,O3. How many moles of Fe are present in 21.6 g of the…

A:

Q: How many molecules are in 6.50g of disilicon trioxide(Si2O3)?

A: Given that,6.50g of disilicon trioxide

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: . How many moles does 6.45g of Acetic Acid (HC2H3O2) contain?

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Q: Threonine is an amino acid with the formula C4H9NO3C4H9NO3. Determine the number of moles of carbon…

A: Formula of Threonine = C4H9NO3  Mass of threonine = 48.15 g Moles of carbon = ?

Q: How many molecules are contained in a pentanal (C5H10O) sample with a mass of 5.27 g?

A: 1 mole of any substance contains Avagadro number (6.023 *1023) of species. therefore, 1 mole of…

Q: A compound of only carbon and bromine consists of 10.15% carbon and has a molar mass of 707.70…

A: The molar mass of the compound is 707.70 g/mol. The contribution of carbon to the molar mass is…

Q: How many moles of atoms of each element are present in 1.00 mol of each of the following compounds?…

A:

Q: Calculate the number of molecules in 90.3 g Fe

A: Given that, mass of Fe = 90.3 g No. of molecules (Atoms) in Fe = ?

Q: Compound X has a molar mass of 134.12 g-mol and the following composition: element 0 carbon mass %…

A:

Q: How many total atoms are in 0.450 g of P2O5?

A: mass of P2O5 = 0.450 gTotal number of atoms = ?Note: molar mass of P2O5 = 141.94 g/mol

Q: on, hydrogen and oxygen 180.16 g/mol.

A: a) moles of C = ( 3.66g / 44.0gmol-1 ) = 0.83mol .......(1)  Mass of C = ( moles of C ) • ( atomic…

Q: Determine the molecular formula

A:

Q: You are given a 10.0 grams sample of ethanol (CH3CH2OH).   Explain how you can use the molar mass of…

A: The Avogadro’s number of any species is defined by a mole. The Avogadro’s number, NA, is equal to…

Q: How many cobalt atoms are in 345 g of cobalt? Calculate the molar mass of carbon tetrachloride,…

A: Since you have posted a  question with sub-parts , we are entitled to answer the first three…

Q: Determine molecular formula. An organic compound that only contains C, H, and O was subjected to…

A: Since the compound is made up of only C, H and O. Hence we can assume the empirical formula of…

Q: A 10.68 g sample of compound that contains only carbon, hydrogen, and oxygen was analyzed through…

A:

Q: 89% copper oxide What is the

A: Given percentage of Copper Cu=89% Given percentage of oxygen=(100-89)=11%

Q: How many total atoms are in 0.770 0g of P2O5?

A: Calculate the moles of P2O5  Moles = grams / molar mass

Q: A crime scene investigator finds a 3.5 g (C10H14N2) sample of nicotine and sends it to the lab for…

A: Please find the attachment.

Q: How many moles of carbon atoms are in 4 mol of dimethylsulfoxide (C2H6SO) O 8 O 2 O 1 O 4 O 6

A: The chemical molecular formula of dimethyl sulfoxide is C2H6SO.

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: A compound with the empirical formula SH3 has a molar mass of about 175 g/mol What is the correct…

A:

Q: Find the The molecular formula for a compound with a mass of 90g/mol and the empirical formula HCO2

A: Molecular mass = 90 g/mol empirical formula = HCO2

Q: Help me please

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

Q: 1) Calculate the number of H atoms in 0.350 mol of glucose, C6H12O6 2) What is the mass in grams of…

A: Given data :  1) moles of glucose = 0.350 mol  2) mol  of glucose = 1.000 mol  molar mass of glucose…

Q: Use compound formulas to determine element composition. A sample of pentanol, C5H120, contains 1.69…

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Q: How many moles of O are in 26.23 moles of Al(C 2 H 3 O 2 ) 3

A: Given :- 26.23 moles of Al(C2H3O2)3  To calculate : number of moles of O

Q: A molecule was determined to have a molar mass of 88.3 g/mol.  How many moles of the compound are in…

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

Q: Calculate the number of atoms in 2.50 mg of Mg

A: We have been given mass of Mg = 2.50 mg and we have been asked to calculate the number of atoms in…

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

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.