An element X has the following masses and % abundance. 35X  (34.97 amu 75.8%) and 37X ( 36.99amu 24.2% ) What is the average atomic mass of X?

Q: A sample of an unknown compound with a mass of 0.847 g has the following composition: 50.51 %…

A: Given, Mass of the compound = 0.847 g Percent mass of fluorine in the compound = 50.51 % Percent…

Q: what is the precent mass of oxalat in (K3Fe(C2O4)3·3H2O, 491.3 g/mol)?

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Q: A certain metal oxide has the formula MO where M denotes the metal. A 44.30-g sample of the compound…

A: MO + H2 → M+H2O44.30 g           33.51 gSince ,        Mass of MO=44.30 g       Mass of M= 35.51…

Q: How many atoms of C are in a sample 1.0 mol sample of C7H16C7H16? 9.73⋅10249.73⋅1024…

A: We have asked for the number of carbon atoms in 1 mole of C7H16

Q: If the m. Wt. of BaSO4 = 233.42 g/mol %3D and m. Wt. of Na(SO4)2= 140.02 g/mol and wt of…

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Q: what is the empirical formula of a coumpound that is 75.95% C, 6.33% H, and 17.72% N? keep elements…

A: coumpound that is 75.95% C, 6.33% H, and 17.72% N Atomic mass of N = 14 g Atomic mass of C = 12 g…

Q: An element (A) has 5 isotopes. The masses (and abundances) of the isotopes 46A, 47A, 48A, 50A are…

A: Given:Average atomic mass = 47.87u.49A/50A = 3.361.

Q: Nitrogen (N) and silicon (Si) form two binary compoundswith the following compositions:Compound…

A: (a) According to given information, in compound 1 the mass percent of N and Si is 33.28 and 66.72…

Q: element b forms a chloride BCl3 containing 46.62% chlorine by mass. what is the identity of this…

A: Consider the molecular mass of the compound BCl3 which is formed by the combination of an unknown…

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

A: Note : As per our guidelines we are supposed to answer one question .please resubmit the other…

Q: the atomic masses of 10B and 11 B are 10.012938 and 11.009305 amu, respectfully. The average atomic…

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Q: Which statement is probably true concerning themasses of individual chlorine atoms: All have,…

A: The correct statement regarding the masses of individual atoms of chlorine has to be determined.

Q: How many moles of SO2 contain 8.02 × 10^21 atoms of oxygen?

A: 1 mole of a substance contains Avogadro's number of atoms. (6.022×1023 atoms ).

Q: 3.121 Avogadro’s number has sometimes been described as aconversion factor between amu and grams.…

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Q: mass

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Q: Calculate the average atomlc mass of lithlum, whlch occurs as two Isotopes that RVU Mu following…

A: We need to calculate average mass from given mass and relative abundance of isotopes.

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: The ratio of the mass of O to the mass of N in N20z is 12:7. An- other binary compound of nitrogen…

A: The given ratio of mass O to the mass of N in N2O3 is 12:7 Mass of O in N2O3 = 3x16 amu…

Q: Two thirds of the atom in a molecule of water is hydrogen. What percentage weight of a water…

A: Given: Hydrogen atoms in a water molecule = 2/3 Atomic weight of hydrogen = 1.008 g/mol Atomic…

Q: How many atoms of carbon are combined with 6.89 moles of hydrogen atoms in a sample of the compound…

A: In ethane C2H6 , 2 moles of carbon are combined with 6 moles of hydrogen.

Q: What is the percent by mass of chromium (atomic mass = 52.00 g/mol) in Cr2S3 (mm = 200.20 g/mol)?…

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Q: An alcohol is 70.57 % C and 5.935 % H by mass. The rest is oxygen. What is the empirical formula of…

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Q: An unknown element X has the following isotopes: 25X (80.5% abundant) and 27X (19.5% abundant). What…

A: Given, The natural abundance of isotope I, 25X = 80.5 % The natural abundance of isotope II, 27X =…

Q: What mass of Al contains the same mumber of atoms as 3,.0g Pb a 23 g 6.0.014 g c 3.0 g d.0.39 g e…

A: Given : Mass of Pb = 3.0 g Since number of atoms of any element is given by, => Number of atoms =…

Q: How many particles of Glucose (C6H1206) are in a 0.25g sample. Round periodic table average atomic…

A: Given, Mass of glucose sample = 0.25 g Chemical formula of glucose = C6H12O6 Molecules or particles…

Q: When barium (Ba) reacts with sulfur (S) to form bariumsulfide (BaS), each Ba atom reacts with an S…

A: Since there are 1:1 ratio of atoms in the molecules, and it concludes that the same amount of each…

Q: h for dellivery from the supplier? Assume that the atomic mass of Ca is 47.0 u.

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Q: A sample of 0.600 mol of a metal M reacts completely withexcess fluorine to form 46.8 g of MF₂.(a)…

A: Given: Number of mole of the metal=0.600mol Mass of MF2 = 46.8g

Q: Question attached

A: To calculate the mass percent of each element in the compound HgS

Q: How many atoms are present in a Mg sample with a mass of 14.6 grams?

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Q: A sample of Fe weighs 82.9 grams. Will a sample of Ba that contains the same number of atoms weigh…

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Q: Calculate the number of atoms of Fe in a sample with mass = 1899 amu.

A: A sample of Fe of mass  1899 amu.The number of atoms of Fe in a sample is to be calculated.

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: The molar mass of an element is numerically equivalent to what? b. 1 mole a. 1 amu c. its atomic…

A: Molar mass is the sum of mass of all atoms and the unit of the molar mass is grams or g

Q: The compound benzene contains 92.26% C, the remain is hydrogen and has molar mass of 78 g/mol. what…

A: Given    C = 92.26 %    H   = (100 - 92.26) %         = 7.74 %  Molar mass of Compound = 78…

Q: An unknown element X has the following isotopes: 5X (72.5% abundant) and 67X. What is the average…

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Q: How many atoms of O there in 24.7 grams of Al(C2H3O2)3?

A: Here structure of the compound is AlC2H3O23 Molar mass of the compound = 27+32×12+1×3+2×16gmol =…

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

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Q: mass

A: 0.415 mol sample of MnX2O7 has a mass of 85.14 g.  What is X?

Q: 23.) cakulate the number of atoms pressert a. 15g of silver, Ag b. i0013g of capper, Cu ci.00139…

A: "Since you have posted a question with multiple subparts, we will solve only first 3 subparts for…

Q: What is the average atomic mass of a mystery substance that is 27.5 at a mass of 37g and 72.5% at a…

A: Given: Mass =37 g  Percentage %=27.5 % Mass =38 Percentage % =72.5% Average mass=?

Q: How many atoms of chlorine (CI) are present in 0.072 g of FeCI,? Given that ; Fe= 56 g /mol, Cl=…

A: Given that mass of FeCl = 0.072 g Molar mass of Fe = 56 g/mol, Cl = 35.5 g /mol Hence, molar mass of…

Q: How many atoms are present in a Mg sample with a mass of 10.6 grams?

A: Given, mass of Mg sample = 10.6 g Number of atoms present in 10.6 g of Mg sample = ? Note: molar…

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: We have a sample of 7.2 moles of the ionic compound, potassium dichromate, K2Cr2O7. How many Cr…

A: Given that , No. Of moles of K2Cr2O7 = 7.2 moles We will calculate the no. Of atoms of Cr as…

Q: A 0.415 mol sample of MnX2O7 has mass of 85.14g identify X indicating the symbol and not the name of…

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Q: Rubbing alcohol often contains propanol, C3H;OH(€). Suppose that you have an 85.9 g sample of…

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Q: A metal alloy containing 67% (by mass) lead and having a density of 9.4 g/cm3 . If the second metal…

A: Given Information -  mass % of lead,Pb= 67%  mass % of tin = 100% - 67% = 33%  mass of lead = 67 g…

Q: All of the following are empirical formulas of compounds EXCEPT- C3HB- O CH2O. O CH4S. O C,H1206

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Q: How many gold (Au) atoms are there in a 5.0 g sample of that is 50% Au by mass?

A: Answer: 7.6421 × 1021 number of gold (Au) atoms are there in a 5.0 g sample of that is 50% Au by…

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.