An experiment requires that enough SiCI2 I2 be used to yield 18.1 g of iodine. How much SiCI2 I2 must be weighed out?  g SiCI2 I2

Q: is formed when elements combine. The COIna chemical reaction a new Different elements combine to…

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Q: Naturally occurring chlorine is 75.78% 35Cl (atomic mass 34.969 u) and 24.22% 37Cl (atomic mass…

A: Given :  Atomic mass of lighter isotope i.e 35Cl (A1) = 34.969 u  Percentage abundance of lighter…

Q: An imaginary element Xz consists of two isotopes having masses of 100.0amu and 102.0 amu. A sample…

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Q: 1. What is the correct formula for iron (II) phosphate? FEPO4 b. Fe;PO4 c. Fe:(PO4)s d. Fe:(PO4)2 2.…

A: 1) the correct formula for iron (II) phosphate is

Q: The compound XEO2E2 is 15.90% by mass of oxygen. Identify element E. Select one: а. N b. There is…

A: The compound given is XeO2E2. And the percent by mass of O = 15.90 %. Assuming 1 moles of compound…

Q: Assume the atomic mass of element X is 22.99 amu. A 20.28-g sample of X combines with 16.76 g of…

A: Answer:- This question is answered by using the simple concept of calculation of atomic mass of the…

Q: A nitrogen oxide is 63.65% by mass nitrogen. The molecular formula could be NO2 N20 N204 NO either…

A: Given, Mass % of Nitrogen = 63.65 %  So, Mass % of Oxygen  =( 100 - 63.65 ) %  = 36.35 %

Q: How many grams of carbon are present in 67.9g of C3H3? Atomic weights: C = 12 H= 1 55.6g 25.5g 22.6g…

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Q: (2.112 Each circle contains a representation of Determine its name, formula, and molecular (formula)…

A: To predict the molecular mass and name, at first one has to determine the chemical formula of the…

Q: A sample of CH2F2 with a mass of 19 contains atoms of F. O 2.2 x 1023 O 9.5 9 3.3 x 1024 4.4 x 1023…

A: The molar mass of C = 12g/mol The molar mass of H = 1g/mol The molar mass of F = 19g/mol

Q: A sample of CH 2F 2 with a mass of 19 g contains atoms of F. 38 в) 3.3х 1024 c) 2.2 x 1023 D) 9.5 E…

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Q: I mol CCI2F2 = 9CC12F2 9/mol CCI2F2 %3D Listall How MUltiply all then add Atomic Elements %3D → many…

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Q: Assume the atomic mass of element X is 22.99 amu. A 22.42−g sample of X combines with 123.73 g of…

A: Mass of X = 22.42 g Mass of Y =123.73 g Atomic mass of element X = 22.99 amu Atomic mass of element…

Q: Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48…

A: Here we have:Volume of common brass = 115.0 cm3Density of common brass = 8.48 g/cm3As we know:

Q: A pure silver sphere has a radius of 0.886 cm. How many silver atoms does it contain? (volume of a…

A: Calculate the volume of the silver sphere,      Volume of silver sphere = 43 π r3= 43 × 227 × (0.886…

Q: If Epsom salt, MgSO4· x H2O, is heated to 250 °C, all the water of hydration is lost. Onheating a…

A: The number of molecules of water occur per formula unit of MgSO4 has to be given.

Q: Write the chemical formula for a compound containing the following elements: arsenic and oxygen; 4:6…

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Q: n 22 A gasoline additive was found to be composed of 38.43% Pb, 17.83% C and 3.74% H. What is its…

A: Percentage of Pb = 38.43 %  Percentage of C = 17.83 %  Percentage of H = 3.74 %  Empirical formula =…

Q: Determin the mass of 12.6 mol ethane, C2H6 O 256 O 126 О 379

A: given, number of mole of ethane = 12.6 mol

Q: a 500. mg tablet of vitamin C, C6H8O6 NOTE THE UNITS OF mg. (a)how many ATOMS are in the vitamin C…

A: GIven ,Molecular mass of vitamin C C6H6O8=176.12g/mol.Given mass of 500mg=0.5ga).Atoms  in the…

Q: 1. Naturally occurring chlorine that is put in pools is 75.53 percent"CI (mass = 34.969 amu) and…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Use the data below to determine the mass ratio of iron to oxygen for compound 2. Mass Fe Mass O…

A:

Q: The natural abundance for element "X's" isotopes are: 19.9% 10X (10.013 amu) and 80.1% 11X…

A: Given, an element X and has two natural isotopes with abundance of19.9% of X10(10.013 amu) and 80.1%…

Q: CROSOTTODICH Calculate average atomic weight. Calculate the atomic weight for bromine. It has two…

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Q: Naturally occurring iron contains 5.82% 54Fe, 91.66 % 56Fe, 2.19% 57Fe, and 0.33% 58Fe.  The…

A: Answer:- This question is answered by using the simple concept of calculation of average atomic mass…

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm3. How many…

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Q: 1. Cobalt forms two sulfides: CoS and Co2S3. Predict the ratio of the two masses of sulfur that…

A: The sulphide of cobalt given are CoS and Co2S3. The oxides of lead are given are PbO and PbO2 The…

Q: Boron and sulfur form two binary compounds. The first contains 0.2247 g B/1.000 g S, and the second…

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Q: You have 53 carbon atoms. What is the mass? Which units should you use g/mol or amu? a. 686.58 amu…

A: Answer: No option is correct. The correct answer is 636.53 amu We should use amu unit instead of…

Q: Boron and sulfur form two binary compounds. The first contains 0.2247 g B/1.000 g S, and the second…

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Q: Calculate the mass percent nitrogen in (NH4)2CO3

A: A way to represent the concentration of an element in a compound or a mixture is Mass percentage.…

Q: Element Atomic Weight (g/mol) Percent Composition Ni 58.6934 36.3% Fe 55.845 17.3% As 74.9216 46.4%…

A: The percentage composition of each element in the compound is given as, Assuming 100 g of the…

Q: H8.Calculate the molae mass (to the neapest hundred th) of capsaiain, Cię tHay NOg

A: To solve this problem we have to calculate the molar mass of C18H27NO3

Q: The element X forms the compound XOCl2 containing 59.6% Cl. What is element X?

A: The empirical formula is the chemical formula of any compound that represents the proportions of…

Q: The element P has the atomic number 12. Element Q has the atomic number 16. What is the formula of…

A: The given data contains, Atomic number of P=12. Atomic number of Q=16

Q: (b) 0.74 MM9SO4 lons: O SO,2- O SO2- Sot O Mg2+ O Mg* O4 [cation*] = i [anion] = i M

A: Given: Concentration of MgSO4 = 0.74 M

Q: A brass alloy contains 87.7% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

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Q: þalance the following chemical equations: NANO3 + PbO → Pn(NO3)2 + Na20 а. b. СазР2 + H2O → Ca(OH)2…

A: The chemical reactions in which the number of each type of atom is equal on the reactants aut and…

Q: Calculate the number of molecules present in 27.2 g of Al(NO3)3. Use the following as average atomic…

A: We have to calculate the number of molecules present.

Q: The formula of caffeine is C8H10N4O2. Determine: The mass of one mole of caffeine. a)195 g/mol…

A: The formula of caffeine is C8H10N4O2 C-8 H-10 N-4 O-2

Q: 15. A sample of 1 mole of which of the following contains the greatest number of oxygen atoms? e.…

A: Oxygen atoms:

Q: What is the mass of 1.48 Mol of potassium sulfide (K2S)? A. 12.0g B. 0.0134g C. 195g D. 74.5g…

A: Solution The mole conception could be a convenient methodology of expressing the quantity of a…

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm3. How many…

A: The question is based on mole concept. We have been given diameter of the silicon atom. we have to…

Q: Naturally occurring chlorine that is put in pools is 75.53 percent 35Cl (mass = 34.969 amu) and…

A: Given : There are total 2 naturally occurring isotopes of chlorine Mass of isotope 1 i.e 35Cl =…

Q: Sodium sulfate hydrate is a sample weighing O.386g with the general formula Na,SO4.XH20 is heated.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: H. Ex: Isotopes of Boron: Boron contains 10B (10.0129g/mol) and 11B. 1°B is 19.91% abundant. Based…

A: given, molar mass of 10B = 10.0129 g/mol let the molar mass of 11B = x g/mol abundance of 10B =…

Q: A mixture of Thallium was made that contained 60.0 % 203TI and 40.0% 205TI. The mass of 203TI and…

A: Given, Percentage of the abundance of 203Tl isotope = 60% Mass of 203Tl isotope = 202.97 amu…

Q: 5. (. a) 3.68 x 1025 How many nitrogen atoms are there in a 346 g sample of pure ammonia (NH3,…

A: Given : Mass of ammonia = 346 g And molar mass of ammonia = 17.031 g

Q: The Cullinan diamond was the largest natural diamond ever found (January 25, 1905). It weighed 3104…

A: 6.023× 10^23 is called Avogadro's number. 1 mole of any substance contains Avogadro's number of…

Q: The ratio of the mass of O to the mass of N in N2O3 is 12:7. Another binary compound of nitrogen has…

A: Step 1        N2O3Mass of Oxygen in N2O3 = 16x3 =48gMass of Nitrogen in N2O3 = 14x2 = 28gMass of…

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.