how many atoms of carbon are in a 312.5 mg sample of C^3H^8?

Q: How many atoms of sulfur are in 279 g of Na₂S₂O₃ ?

A: Given , Mass = 279 g Molar mass of Na₂S₂O₃= 158.11 g/mol

Q: O What is the mass of 0.6 mole of CO2 (in g)? A) 31 B) 7 C) 26 D) 18 E) 37

A: Given: Moles of CO2 = 0.6 mol Standard data: The molar mass of CO2 = 44 g/mol

Q: Number of atoms of sulfur in 0.0218 kg of Na2S2O3

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Q: 1. Calculate the mass in grams of a single oxygen molecule, 02.

A: Molar mass of O2 is 32.0 g/mol  We have to calculate here mass of 1 molecule of oxygen i.e. O2

Q: How many atoms are in 1 mole of calcium atoms? 6.02 x 10-23 6.02 x 1023 6.02 1

A: One mole of any substance contains 6.022×1023 particles in it.

Q: Calculate the number of grams in 1.5 x10^16 atoms of sulfur.

A: Given, atoms of Sulfur = 1.5 x 1016  Molar mass of Sulfur = 32.065 g/mol

Q: 12. If that hamburger contains 3.1 x 10 moles (or 0.000 000 31 moles) of selenium, how many grams of…

A: Given, Moles of selenium = 3.1 × 10-7 moles Note: Atomic mass of selenium = 78.96 g/mol Mass (in…

Q: ow many moles of H2O does 1.2 x 1024 molecules represent?

A: Given,  1.2 x 1024 molecules of H2O

Q: Calculate the mass CARBON in 0.0299 moles of C6H12O6.

A: A pure compound is that which contains its constituent atoms in fixed ratio by mass.C6H12O6  is a…

Q: How many carbon atoms are there in 9.50 g Na2C2O4?

A: It is known that 1 mole of a substance is equal to 6.022×1023 atoms. The given compound is…

Q: How many atoms of vanadium are in 1.28 grams of vanadium ?

A: 1 mole of vanadium contains Avogadro’s number of atoms. The number of mole of 1.28 g of vanadium…

Q: What is the mass of the compound C8H18 (Mm = 114.26 g.mol-1) that contains 7.20x1022 hydrogen atoms?

A: Given :- molar mass of C8H18 = 114.26 g.mol-1  Number of H atoms = 7.20 × 1022 atoms   To calculate…

Q: What is the molar mass of magnesium (Mg)? A)24.305 B)54.9380 C)48.610 D)35.45 E)22.99

A: Given      Element  = Magnesium  Molar mass = ?

Q: How many oxygen atoms are in 2.50 moles of C6H12O6?

A:

Q: How many atoms in total are there in one molecule of Mg(NO3)2?

A: In a molecular formula, symbols of all the constituting atoms are shown along with their numbers in…

Q: 5. How many atoms of hydrogen are present in 2.69 moles of water? 6. Calculate the mass of nitrogen…

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Q: What is the mass of one atom of I? O 4.745 x 10-22 g O 3.443 x 10-22 g O 6.641x 10-23 g O 2.107 x…

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Q: A substance is 77.5% Pb, 4.5% C, and 18.0% O. How many atoms of carbon are there for each atom  of…

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Q: How many oxygen atoms are there in 50 g of sucrose (C12H22O11).

A: Mass of sucrose = 50 g  Formula of sucrose = C12H22O11

Q: Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 41.0% of the lighter…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17 H22 CINO4, of mass 24.0 mg…

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Q: How many moles of iodine atoms are there in a sample that consists of 1.35e+23 molecules of…

A: Mole=no of molecule÷6×1023 Mole=1.35×1023÷6×1023 Mole= 0.225 1 mole iodine elememental have 2 mole…

Q: What mass of ethanol (C2H6O) would contain 7.0 x 1026 atoms of carbon?

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Q: b. Mass of I- in the sample. O 0.1438 g O 0.1722 g O 0.1623 g O 0.1939 g O 0.1840 g

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Q: Calculate the number of atoms present in a sample of 1.50 grams of silver (Ag).

A: Find the mole of silver that present in 1.50 grams of silver sample,

Q: Find the total number of atoms in a sample of cocaine hydrochloride, C17 H22 CINO4, of mass 25.5 mg…

A:

Q: How many moles would 1.00 x 10^23 molecules of methane(CH4) represent

A: Given  Number of molecule of CH4  = 1 × 1023 molecule  Number of mole = ?

Q: 1) How many moles of cobalt (Co) atoms are there in 6.00 X 10 (6 billion) Co atoms? 2) How

A: We know, 1 mols = 6.022x1023 atoms

Q: Arrange the following substances in order of increasing mass percent of carbon. a. caffeine.…

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Q: how many atoms of carbon are in a 12.5 mg sample of C^3H^8?

A: Given, Mass of C3H8 = 12.5 mg = 0.0125 g Formula used,  moles=given massMolar mass 1 mol = 6.023 x…

Q: How many carbon atoms are in 2.65 x 1023 molecules of C,H,?

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Q: Calculate the percentage of nitrogen, by mass, in Ca(NO3)2.

A: Assuming we have 1 mole of Ca(NO3)2. => mass of Ca(NO3)2 we have = molar mass of Ca(NO3)2 = 164 g…

Q: What mass of Chromium metal would contain 5.00 x 1020 atoms of Cr? 0.0432 g

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Q: If a sample of N2O4 contains 19 g of nitrogen (N), how many moles of N2O4 are in that sample?

A: Since in 1 mole of N2O4 we will have 2 moles of N Hence moles of N2O4 = moles of N / 2  Since moles…

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: How much does 2.1 moles of calcium hydroxide weigh in grams?

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Q: the mass ( in g) of 1.2 x 10^24 atoms of molybdenum, Mo.

A: A mole refers to the amount of discrete entities (atoms, molecules, particles ) present in a…

Q: 127: An iron ore contains 38% Fe203 by mass. What is the maximum mass of iron that can be recovered…

A: 127. Given information, An iron re contains 38% Fe2O3 by mass Mass of iron ore = 10.0 kg

Q: A macromolecule has an empirical formula of C4H306. The molecular mass for the macromolecule is…

A: Given :- empirical formula of macromolecule = C4H3O6  Molecular mass of macromolecule = 429.21 g/mol…

Q: How many moles would 1.00 x 1023 molecules of methane ( CH4 ) represent? How many Sulfur atoms would…

A: According to avogadro's rule number of molecule present in 1 mole of substance is 6.022×1023, and…

Q: How many moles of NF3 contain 2.55 x 1024 fluorine atoms?

A: We have to calculate the moles of NF3.

Q: If you have 1 mole of Ca3(PO4)2, how many moles of phosphorus do you have?

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Q: how many hydrogen atoms are there in 96.0 g of c2h4

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Q: How many total atoms of all kinds are present in a 39 gram sample of CaF2?

A: Molar mass is the mass of 1 mole substance. Molar mass of CaF2 is 78.07 g/mol.

Q: Calculate the number of atoms in 16 g of Si-28. The isotope Si-28 has a mass of 27.977 amu. 0.57 mol…

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Q: 1. What is the percent, by mass, of chromium in KCrO4? a. 26,776 % b. 31.763 % c. 40.268 % d. 42.241…

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

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Q: Find the mass of 2.45 X 1023 molecules of Ca(OH)2? Use: Ca = 42.0g, H = 1.25g and O = 15.7g as…

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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.