A sample of a compound with the molecular formula C20H24N2O2 contains 2.75 x 1024 nitrogen atoms. What is the sample mass in grams? Report your answers to 3 s.f. and do not include units in your answer.

Q: A 19.00 kg sample of an unknown compound contains 0.06 kg of hydrogen, 11.01 kg of gold, 7.93 kg of…

A: Percent composition of any element in a compound is given by the following expression        percent…

Q: The use of freons is being phased out because of the damage these compounds do to the stratospheric…

A: a.

Q: 2. A mixture of Na2SO4 and its hydrate Na,SO4-10H2O has a mass of 1.5099 g. After heating to drive…

A: Mass percent :- The mass of a component present in 100 grams of a mixture is known as mass…

Q: 2. A sample of a substance containing only carbon, hydrogen, and oxygen has mass x in grams. It is…

A: The equation for the burning of carbohydrate is: x12a+b+16c CaHbOc  +  O2   →    y44CO2  +  Z18…

Q: A particular ore of lead, galena, is 10.0% lead sulfide, PbS, and 90.0% impurities by weight. What…

A: we  need to calculate mass of Pb in the ore

Q: Calculate the number of cations and anions in 7.18 g of KBr. cations anions x 10 x 10

A:

Q: The mass of an organic compound was found to be 58.053 86 by mass spectrometry. Is the sample C₂HN₂,…

A: The solution is given below -

Q: a. What is the mass in grams of 1.75 × 1024 atoms of silicon? grams b. How many silicon atoms are…

A:

Q: A compound was found to contain 115.49g of Ca, 92.16 g of O, and 5.82 g of H. What is the total mass…

A: mass of Ca = 115.49g mass of O = 92.16 g mass of H =  5.82 g  Molar mass of Ca = 40.078 g/molMolar…

Q: a. How many ATOMS of boron are present in 7.41 grams of boron trichloride? 3.805x10^21 atoms of…

A: Molecule given = BCl3 1 molecule of BCl3 = 1×6.022 ×1023 Molar mass of BCl3 = 117.3 g/mol 117.3 g of…

Q: a sample of pure alumina hydrate was obtained from a bag of flame retardant. A 5.000g sample of the…

A: Given, Mass of sample = 5.000g. Final weight of sample after heating = 2.651g. The mass of water in…

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Mass of crucible = 26.639 g Mass of crucible + mass of Na2SO4·xH2O = 27.085 g Therefore mass of…

Q: Calculate the molar mass of Iron(III) chloride hexahydrate: FeCl3• 6H20. O 162.29 g/mol O 180.29…

A: Given  Molar mass of EDTA disodium salt dihydrate = 372.24 g/mole Molar Mass of FeCl3.6H2O Molar…

Q: How many moles of Cu(NO3)2 are in 3.4 x 1022 molecules? Please have your answer in decimal format…

A:

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: 1- First calculate the moles of compound XBr3  moles of XBr3 = ( moles of Br ) / 3  moles of XBr3 =…

Q: Sucrose has the molecular formula C12H22011. If a sucrose sample contains 9.0 x 1024 atoms of…

A: Given, Sucrose has the molecular formula: C12H22O11 A sucrose sample contains, Number of atoms of…

Q: mass

A:

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Since on heating the compound, the mass of water will be lost as it will get vaporised  Hence the…

Q: 717.7 grams of isomaltitol, C12H24O11, was combusted in a furnace completely in an excess oxygen.…

A:

Q: calculate the mass of fluorine contained in 56.5 g of copper(II) fluoride.

A: Percent by mass (%w/w) = (mass of F/mass of CuF2) × 100%

Q: What is the mass in grams of 7.94 x 1015 molecules of CS,?

A:

Q: Part B 118 mg C6 H12O6 in 5.01 g H20 Express your answer as a percentage. ? mass % = % Submit…

A: Mass% = (mass of solute/mass of Solution) x 100

Q: Assuming gasoline to be pure octane, C8H18 (actually, it is a mixture of many substances), an…

A: An automobile getting 22.7 miles per gallon would consume 5.10x10^23 molecules per mile. Find out,…

Q: What is the mass percentage of carbon in C7H11O3? Express your answer as a percentage (i.e., out of…

A: Mass percentage of element in compound is defined as percent ratio of element mass to the whole…

Q: You wish to prepare 210 grams of 16.3 % Mg(NO3)2 You will need grams of magnesium nitrate and mL of…

A: Given that we have to prepare a 210 grams of 16.3 % MgNO32 solution. Recall the expression of mass…

Q: You can also calculate percent composition from a formula. This is similar to percent abundance in…

A:

Q: A newly found compound was discovered to contain 4 iron atoms. If the molar mass of this compound is…

A:

Q: Tartaric acid is the white, powdery substance that coats sour candies such as Sour Patch Kids.…

A: To solve this problem first we find the mass of C , H and O  Then the number of mole of each to get…

Q: A Freon leak in the air conditioning system of an older car releases 30 g of CF2Cl2 per month. Part…

A: To calculate the mass of chlorine(Cl) emitted into the atmosphere each year by the car due to a…

Q: Determine the mass in grams of 2.67 x 10²¹ atoms of arsenic. (The mass of one mole of arsenic is…

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

Q: 3. Using the percentage equation given in the introduction, if 8.912 g of sand are recovered from an…

A: Percentage of a component in a mixture is given by the formula  % = [ mass of component / mass of…

Q: the formula for disulfiram decafluoride is S2F10   A.How many molecules are in 1.35 grams of…

A: A.

Q: What is the mass of 7.10 moles of magnesium chloride, MgCl2? Express your answer with the…

A: 1) The compound given is MgCl2 with moles = 7.10 mol Since molar mass of MgCl2 = Atomic mass of Mg +…

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.