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: What is the mass in grams of 0.76 mol of potassium chloride? Group of answer choices a, 60 b, 99.4…

A: We'll answer the first question since the exact one wasn't specified. Please submit a new question…

Q: The atomic molar mass of some elements, as shown in the periodic table, is as follows. Atomic molar…

A: moles of calcium = 3.00 molAtomic molar mass of calcium = 40.08 g/molmass of calcium = ?

Q: 3.A sample of 7.2 moles of the ionic compound, potassium dichromate, K2Cr2O7, is present. How many…

A: The formula of the given compound is K2Cr2O7. One mole of potassium dichromate contains the number…

Q: If 0. 274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of…

A: Given- Moles of substance =0.274 moles  Weight of substance= 62.5 g

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: Given :-  Percent composition of Zn = 23.4 %  Percent composition of As = 53.7%  Percent composition…

Q: The molar mass of calcium hydroxide, Ca(OH)2, is O 54.02 g/mole O 58.09 g/mole O 114.2 g/mole 74.10…

A:

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: First calculate percentage ratio  of mole then form formula

Q: 31. How many moles of potassium bromide can be produced from the reaction of 2.92 moles of potassium…

A:

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: 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: Calculate the molar mass of calcium nitrate. O 132.10 g/mol O 136.03 g/mol 102.09 g/mol O none of…

A: Molecular  mass of the compound is the sum of the atomic mass of all the atoms present in compound.…

Q: How many moles are contained in each number of grams of table sugar (C 12H 22O 11, molar mass 342.3…

A: Given data molar mass of sugar ( C12H22O11 ) = 342.3 g/mole   mass of sugar part(a) 0.500 g…

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: What is the percent composition by mass of Carbon in a 2.55G sample of propanol,  CH3CH2CH2OH The…

A: Mass of propanol = 2.55 g  Molar mass of propanol = 60.09 g/mol We need to determine percentage of…

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: A water solution of sulfuric acid (H2SO4) has a density of 1.864 g/mL and is 73.0% H2SO4 by mass.…

A:

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A:

Q: 3.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: Given that,Mass of compound, which is made up of carbon, hydrogen and oxygen = Molecular mass of…

Q: Formula Amount of Molar Mass of Amount of Samples units or molecules mass(g/mol) sample(g) atoms…

A:

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: Determine the mass in grams of HNO3 formed when it react to form 15.5 g HNO3. 3NO2 + H202HNO; + NO…

A:

Q: An excess of Al and 6.0 mol of Br, are reacted according to the equation 2Al + 3Br, 2A|Br; How many…

A: We know the amount of formation of product is always accordingly the limiting reagent. Here Al is in…

Q: Determine the mass in grams of HNO3 formed when it react to form 15.5 g HNO3. 3NO2 + H20 ®2HNO; + NO…

A:

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: 96. Methane gas (16 g, 1.0 mole) and oxygen gas (96 g, 3.0 moles) are reacted in a sealed container.…

A:

Q: 19) How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05…

A:

Q: Enter your answer in the provided box. What mass of Ca(NO3)2 is required to prepare a solution…

A: A solution of Ca(NO3)2 having 0.969 mol is needed. Molar mass of Ca(NO3)2 = 164.0 g/mol

Q: A 115 g sample of dry ice, CO₂, contains how many moles? 3.22 x 103 mol 4.11 mol 28.0 mol 2.61 mol…

A:

Q: What is the molar mass of 7 kg sodium hydroxide? O 40.85 moles 45. 35 moles O 17.35 g/moles 40.00…

A: Given: 7 Kg of sodium hydroxide.

Q: The molar mass is 876.16 g/mol.    If you have 5.0 mL of this oil, how many moles does it contain?…

A: Given --> Density = 0.79 g/mL  Molar mass = 876.16 g/mol  Volume = 5 ml  Density = Mass / Volume…

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: Which one of the following is not equivalent to one mol of the substance? O 8.0 g He O 6.02 x 1023 C…

A: The correct option is:

Q: An unknown compound contains only C, H, and O. Combustion of 7.00 g of this compound produced 15.9 g…

A:

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A:

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: The mineral sample has the elemental composition: Element atomic weight (g/mol) Percent…

Q: How many moles of sodium azide (NaN3) are required to produce 0.23

A:

Q: Which of the following is true about finding the molar mass of potassium sulfate, K₂SO4? A. The…

A: The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of…

Q: Use the following data and steps below to calculate the formula of the copper chloride hydrate.…

A: Given : Mass of aluminium pan = 0.4661 g And mass of CuCl2 produced after heating with pan = 1.1357…

Q: Combustion of 8.45 mg of an unknown substance yields 14.0 mg CO2 and 7.08 mg H20. The unknown…

A: We have to calculate the % of each element in substance.

Q: How many moles of MgCl2 are present in 78.3g of MgCl₂? O 0.822 moles O 7450 moles O 1.31 moles O4680…

A:

Q: The atomic molar mass of some elements, as shown in the periodic table, is as follows. Atomic molar…

A: Molar mass of calcium nitrate = ?Note: chemical formula of calcium nitrate is Ca(NO3)2.Atomic molar…

Q: An unknown compound contains only carbon, hydrogen, and oxygen. Combustion of a 16.45 mg sample…

A: mass of sample = 16.45 mg = 0.01645 g mass of CO2 = 38.93 mg = 0.03893 g mass of H2O= 15.93 mg =…

Q: them from smallest to largest by mass. 0.75 mol H20(liq) 7.0 g N2(g) 0.55 mol Ar(g) 0.45 mol N2(g)

A: Mole of a substance or a mole of a particles is defined as exactly 6×10^23 particles which may be…

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.