A 0.632 mol sample of C6H8X2 has  mass of 90.07g identify X indicating the symbol and not the name of the element?

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: 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: How many moles of oxygen atoms are there in 15. 53 moles of N02?

A: Given -> Moles of NO2 = 15.53 mole

Q: How many grams are in moles of F? Atomic weight of F is=19.00

A: Answer :-  Grams in moles of F = 19.00 g…

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: 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: How many atoms of Cu are existing in 2.36 g of copper wire?

A: Since molar mass of Cu = 63.546 g/mol Mass of Cu = 2.36 g (given)

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: a. 1.51 x 1015 atoms of Si to mol of Si

A: Given number of atoms can be easily calculated to moles by using avogadro number.

Q: What mass of sulfur would be in a 124.56 g sample of sodium thiosulfate Na, S,0,?

A: The mass of sodium thiosulfate    is 124.56 g and its molar mass    is 158.11 g/mol.    now we…

Q: How many Atoms are there in C6H12O6 ?

A: Atoms are the basic building blocks of all matter. They can combine to form molecules, whose…

Q: Determine the number of atoms in 21.0 grams of vanadium, V. (The mass of one mole of vanadium is…

A:

Q: 1. Calculate the mass of carbon in a 1-carat diamond that contains 7.56 × 1022 atoms of carbon.

A:

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: The density of helium in a balloon is 1.18 g/L. If a balloon holds 2.99 L of He, how many atoms of…

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Q: How many atoms of hydrogen are found in 8.12 mol of ethane, C2H6?

A: Given -> Moles of ethane = 8.12 mole

Q: A sample of Fe(H2PO4)3 that contains 12 000 oxygen atoms must also contain how many phosphorus…

A: Given Number of oxygen atoms = 12000 To find number of phosphorus atoms

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: The atomic mass of fluorine is 18.998 amu, and its mass spectrum shows a large peak at this mass.…

A: The isotope of fluorine having a mass of 18.998 amu is highly abundant by a very large amount, which…

Q: In 100.5 g of water (H2O), how many total atoms are there?

A: Number of atoms in a molecule = Atomicity of molecule x no. of moleculeNumber of molecule = no. of…

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: 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: 1. Calculate the number of grams in one mole of CaSO,7H2O? (Atomic weight Ca-40 ,S=32 ,0=16 ,H-1).

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

Q: A carbon-hydrogen-nitrogen compound has a molar mass of 114.20 g/mol and it has the following…

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

Q: X represents a nonmetal atom with an atomic mass of 107.91 amu.  Calculate the number of grams of…

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Q: A sample of 0.741 mol of a metal M reacts completly with excess flourine to form 57.8 g of MF2. What…

A: Chemical equation: M  +  F2  ------>  MF2 Number of moles of MF2 = number of moles of M

Q: A toy top has a mass of 32.0Cu. How many atoms Сu are in this spinning top, given that the average…

A: One mole of any substance consists of 6.022×1023 particles.Number of moles of any substance present…

Q: what is the molecular formula for a substance that in 1 mole of sample contains 1 mole of S 24.1 x…

A: Given, 1 mole of a sample contains: 1 mole of S, 24.1 x 1023 atoms of F and 71.0 g of Cl.To find the…

Q: What is the mass of a sodium nitride sample,NA3N, which contains 9.76*1012 atoms of sodium?

A: Given that the number of atoms of sodium in sodium nitride is 9.76*1012 atoms. Using the…

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

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Q: 0. How many grams of platinum contain the same number of atoms as 49.5g of mercury?

A: Applying mole concept and number of atoms.

Q: Calculate the mass of each sample. a. 1.05 × 10²26 atoms of neon, Ne(g)

A: 1 mole of atom = 6.022 × 1023 atoms

Q: A sample of 0.593 mol of a metal M reacts completely with excess fluorine to form 46.2 g of MF2.…

A: Given : Moles of metal M = 0.593moles Mass of MF2 = 46.2g

Q: Which of the following contains the most atoms? 24.305g Mg 39.098g K 9.0122g Be 21.62g B

A: One mole of a substance contains 6.022×1023 atoms and the number of moles of a substance can be…

Q: A 12.0 gram of sample of Cr2(SO4)3 contains how many sulfur atoms?

A: Given data : Mass of Cr2(SO4)3 = 12.0 g Molar mass of Cr2(SO4)3 = 392.16 g/mol

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: For 2.577 g of a compound containing only copper and oxygen, Cu,O, a student found that it contained…

A: Answer = 0.07781 mole

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

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Q: mass

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

Q: A fictitious element only has two naturally occurring isotopes: X and Y. If isotope X has a mass of…

A:

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 sample of 0.262 mol of a metal M reacts completely with excess fluorine to form 20.5 g of MF2.…

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Q: A 21.37 gram sample of an unknow element contains 0.3267 moles what is the identity of the element

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Q: Determine the number of atoms in 33.0 grams of vanadium, V. (The mass of one mole of vanadium is…

A: Given is,  Mass of vanadium = 33.0 g Molar mass of Vanadium = 50.94 g/mol

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

A:

Q: How many grams of He are there in a sample of He that contains 5.06×1023 atoms? grams

A: 1- First calculate the number of moles of He atoms :  We know that,  Number of moles = [ number of…

Q: 2. How many moles would there be in 500 atoms of Silver? - 3. What is the mass of exactly 230 Sodium…

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Q: xplain how the atomic mass unit (amu) is defined and (ii) explain how the definition of an amu in…

A: A Unit of mass is used to explain the atomic weight....i. e amu. Atomic mass is the quantity of…

Q: 1. Calculate the number of grams in one mole of CaSO-7H2O ? (Atomic weight Ca-40 ,S=32 ,O=16 ,H=1).

A:

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.