A pure sample of an unknown molecule has a mass of 35.51 g and contains 0.2000 moles. What is the molecular (molar) mass of the substance? O 177.55 g/mol O 7.102 g/mol O.0056 g/mol 5.63 g/mol

Q: convert 64.8 g Ca(HCO3)2 to moles Ca(HCO3)2

A: Name of the compound Ca(HCO3)2 is calcium bicarbonate Given :  Weight of Ca(HCO3)2 = 64.8 g

Q: Lipitor (C33H35FN,O5) is an important pharmaceutical compound for cardiovascular health. The molar…

A: Given :-  Molar mass of lipitor = 558.63 g/mol  Mass of lipitor in a dose = 0.0100 g  To calculate…

Q: Acetaminophen (pictured) is a popular nonaspirin, "over-the-counter" pain reliever. What is the mass…

A: Given,             AcetaminophenRequired,                   The mass % of each elements in…

Q: How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99…

A: First convert the given grams of Al2(CO3)3 to moles.  Moles=MassMolar mass=47.6 g233.99 g/mol=0.2034…

Q: How many molecules of CO2 are present in 43.6 g of CO2? O 5.96 x 1023 O 4.60 x 1023 O 8.90 x 1026 O…

A: The given data contains, mass of CO2 = 43.6 g. Molar mass of CO2 = 44 g/mol.

Q: A sample of ammonium phosphite, (NH4)3PO3, contains 0.162 mol of nitrogen atoms. The number of moles…

A: Given , ammonium phosphite  (NH4)3PO3

Q: The mineral hedyphane has the formula Pb3Ca2(AsO4)3Cl  (m.w = 1154.0 g/mol).  How many moles of…

A: A chemical formula represents the number of elements present in a compound in their relative…

Q: Suppose you have two samples that are equal in weight, 24.824.8 g VV and 24.824.8 g Cr2O3Cr2O3.…

A: Given, Mass of V = 24.8g. Mass of Cr2O3 = 24.8g.

Q: 2 Mg(s) + 3 N2 (g) --> 2 MgN3 (s) How many moles of N2 will be used to produce 115 grams of MgN3?

A: The given reaction is,             2 Mg(s) + 3 N2 (g) --> 2 MgN3 (s) We have, mass of MgN3 = 115…

Q: What mass of N2 is needed to produce 10.00 g N3F? 3N2 + F2 ⎯→ 2N3F

A: Number of moles present in 10.00 g N3F is determined as shown below: No.of moles=massMolar massNo.of…

Q: How many g are in 35 mg? O 3.5 g O 35 g O 0.035 g O 35,000 g

A: Given,  35mg of any substance.  It converted to gram.

Q: What is the mass percent of bromine in lithium bromide?? 1.47.6% 2.52.4% 3.92.01% 4.7.99%…

A: Answer: option 3) 92.01 % is the mass percent of bromine in lithium bromide.

Q: A 1.7500 g sample of a zinc compound ("ZnX") contains 0.8400 g of zinc. What is the molar mass of…

A: Given the mass of the unknown compound, ZnX = 1.7500 g Given the formula of the unknown compound is…

Q: A compound contains, by mass, 81.7% carbon and 18.3% hydrogen. A 0.15 mole sample of this compound…

A: Given  % Carbon  = 81.7 %  % H   =  18.3 %  Number of mole     = 0.15 mole  Mass of compound = 6.6…

Q: If the empirical formula of a compound is P2O5, what could be a possible molar mass of the molecular…

A: molar mass of P2O5 :

Q: A sample of Water, H2O, has a mass of 55 grams. Determine the number of moles in the sample.

A:

Q: CO2 has a molar mass of 44 grams per mole. 4.4 grams of CO2 is how many moles? A)  193.6 molecules…

A: mass of CO2 = 4.4 gmolar mass of CO2 = 44 g/molNumber of molecules of CO2 = ?Number of moles of CO2…

Q: How many atoms of zinc are present in a sample that contains 7.79×102 grams of zinc?The molar mass…

A: The mass of one gram atom is equal to the mass of 6.022× 1023 atoms of any element. Thus, it is…

Q: 3. How many moles are represented by 3.01 · 10²24 oxygen atoms? 2 moles 5 moles 250 moles 10 moles

A: One mole has 6.022 x 1023 Therefore 10.0moles will have 10x 6.022 x 1023 =6.022 x 1024 6.022 x 1023…

Q: Chalk is mostly made of calcium carbonate, CaCO3. If it took 48.6 g of chalk to write your name on…

A: Option A will be correct.

Q: Phosphorus pentachloride, PCIs, a white solid that has a pungent, unpleasant odor, is used as a…

A: mole is equal to weight of substance divide by it's molar mass

Q: What is the molar mass of phosphorus pentachloride (PC15)? O 190.30 g/mol O 208.22 g/mol O 172.75…

A:

Q: Calculate the percent composition by mass of each element in Al(OH)3. Use at least three significant…

A: 1 mol of Al(OH)3 contains 1mol of Al, 3 mol of O and 3 mol of H atoms.  Molar mass of Al(OH)3 =…

Q: What amount in moles is 4.77x10^25 (to the power of 25) molecules?? 1.2.87x10^49 mol 2.79.2 mol…

A: Molecules = 4.77 x 1025

Q: 8. A 10.00 g sample of a compound that consists of carbon and hydrogen is found to consist of 7.99 g…

A:

Q: For the following reactions, determine the value of x (in mol). a. 4 C+ S8 → 4 CS2 mol 1.9 mol Sg…

A:

Q: How many atoms of gallium are present in a sample that contains 75.1 grams of gallium?The molar mass…

A: Number of atoms can be determined by multiplying the number of moles with Avogadro number.  For that…

Q: Aluminium has a density of 2.70 | g/cm3 . How many moles of aluminum are in a 13.2 cm3 block of the…

A: Density :- Density of a substance is its amountof mass per unit volume . So , density is the…

Q: . How many moles of hydrogen sulfide (H2S 34.082 g/mol) are contained in a 35.0-g sample of this…

A:

Q: What mass of SbF3 (179 g/mol) is needed to produce 1.00 g of Freon-12, CCl2F2 (molar mass = 121…

A: The balanced equation of the reaction is given and the moles of CCl2F2 is calculated as shown,

Q: Use this chemical equation to answer the question below: 2K + Br2 2 KBr Which of the following would…

A:

Q: What is the mass in grams of 5.18x102 mol H₂SO₂? What is the number of moles in 4.95 g H₂SO₂? 2 3…

A:

Q: Determine the number of atoms in 3.50 g of an unknown substance with a molar mass of 197g/mol. * O…

A: NOTE : Since the number of atoms in each molecule of substance or the formula of substance is not…

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.