What is the natural abundance of copper-65 (64.9278 amu)?

Q: How many grams of tungsten(VI) oxide, and how many grams of hydrogen must you start with to prepare…

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Q: If the molecular mass of an oxide of nitrogen is 108 and 4.02 g of N combine with 11.48 g of O, what…

A: Given, Given mass of nitrogen = 4.02 g Molar mass of nitrogen = 14.01 g/mol Given mass of oxygen =…

Q: An unknown element is a mixture of isotopes 120X and 122X.  The average atomic mass is 120.70.  What…

A: Suppose percentage abundance of 122X = A percentage abundance of  120X = (100 - A) Fraction of 122X…

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: What is the average mass, in grams, of one Zna Multiple Choice O 1661 x 10 24 O 65.39 amu O 65.39 g…

A: Molar mass of Zn = 65.38 g/mol

Q: 22 11. Find the mass in grams of 2.54 x 10 molecules of H,SO,.

A: Number of molecules of H2SO4 = 2.54 × 1022 molecules. Mass of H2SO4 (in grams ) = ?

Q: What is the mass, in grams, of 557 copper atoms?

A: Given, number of atoms of copper =557 we are asked to calculate the mass (in grams) of 557 copper…

Q: How much does 4.28 x 10 21 atoms of Nickel weigh?

A: We know that, one mole of any substance contains 6.022 × 1023 atoms. We can determine the weight by…

Q: How much would 2.4 x 1024 molecules of N2O5 weigh?

A: Given- number of Molecules =2.4 ×10^24 molecules

Q: How many grams of aluminum are there in 4.05 x 10²5 molecules of Al½O3?

A: Given:- number of molecules of Al2O3 = 4.05 × 1025 molecules  To calculate :- mass of Al in grams

Q: 18. How many moles of gold atoms do 3.45 X 1044 gold atoms constitute?

A: We know that the number of atoms is given by below expression  number of atoms = moles X avogadro…

Q: 2. If you have 1.00 grams of N22CO3, how many moles of Na2CO3 is that?

A: Given, mass of Na2 CO3 = 1.0 g Moles of Na2CO3  = ?  Firstly, find Molecular mass of Na2CO3

Q: What is the mass, in grams, of 2.08 × 1024 aluminum (Al) atoms?

A: The question is based on mole concept. We have to determine mass of aluminium present.

Q: Iron exists in nature as a mixture of predominantly three isotopes: 26Fe (53.94 amu), 56 neFe (55.93…

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Q: How many grams of oxygen are there in 53.16 g of Ca(C2H3O2)2?

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Q: 3.00 x 1023 atoms

A: Mass of Ca = 20.0 g Molar mass(MM) of Ca = 40.08 g Moles of Ca = Mass/MM     = 20.0/40.08   = 0.500…

Q: There are two naturally occurring isotopes of europium, 151Eu (151.0 amu) and 153EU (153.0 amu). If…

A: Given : There are 2 naturally occurring isotopes of europium. Mass of 151Eu = 151.0 amu Mass of…

Q: What is the mass, in grams, of each of the following samples? a.) 2.75 mol of iron, Fe  b.) 0.115…

A: Mole of solid sample is calculated by below formula,

Q: What is the mass in grams of 5.56 x 1023 atoms of arsenic (As) ?

A: 1 mole of As is having atomic mass                                           = 74.9216 g 1 mole is…

Q: 2. In a chemical atomic mass determination, the tin content of 3.7692 g of SnCl4 was found to be…

A: In SnCl4 one Sn atom combine with 4 chlorine atom. Given mass of SnCl4 is 3.7692 g and mass of Sn is…

Q: How many molecules are there in 1000 grams of  C12H22O11  or table sugar?

A: We have to calculate the  number of molecules in 1000 g of table sugar.

Q: How many boron atoms are there in 2.00 g of boron?

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Q: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

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Q: How many moles of zinc, Zn, are in 1.35×10^24 Zn atoms?

A: Question is based on mole concept. We have to calculate number of moles of zinc.

Q: What is the mass in grams of 9.76 × 1012 atoms of naturally occurring potassium?

A: mass = 6.32 x 10-10 g

Q: what is the mass, in grams, of 2.0×1023 lead atoms

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Q: 4. How many atoms of Iodine are contain ed in a sample of Iodine that has a mass of 1.247 x 105 amu?

A: Introduction: An atomic mass unit is a unit used to express the relative maases of atoms.One atomic…

Q: How many atoms of nitrogen are there in 5.00 g N?

A: We have to predict the number of atoms of N.

Q: What is the mass in grams of 2.00 × 105 atoms of naturally occurring neon?

A: Given : Number of atoms of neon i.e Ne = 2.00 X 105 atoms.

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: You have 3.31 L of water that contains 25 mg/L of PO43-. What is the total amount of phosphate in…

A: • The values provided in the question are:-    i) Density of phosphate ion solution,d  = 25 mg/L…

Q: What is the mass, in grams, of Vitamin C (C6H8O6) that contains 1.076 grams of carbon?

A: Molar mass of C = 12.01 g/mol mass(C)= 1.076 g number of mol of C, n = mass of C/molar mass of C…

Q: How many grams of nitrogen are there in 7.5 g of Ca(NO 3) 2?

A: We have 2 moles (atoms)  of Nitrogen atom in 1mol (molecule) of. Calcium nitrate . Or 14×2= 28 g of…

Q: If there are 8.59 x 1022 molecules of NaCl in a salt shaker, what is the mass of NaCl?

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Q: What is the mass in grams of 2.68 * 1022 atoms of uranium?

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Q: How many grams of oxygen are in 48 grams of sodium bicarbonate, NaHCO3?

A: 1 mole = 6.022×1023 (Avogadro's number) The mass of 1 mole of atoms is called atomic mass For…

Q: What is the % mass of oxygen in citric acid, C6H807?

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Q: How many grams of oxygen are there in 58.0 grams of HCIO2?

A: Here we are asked to calculate the mass of oxygen in 58.0 gram of HClO2molar mass of  HClO2 =68.5…

Q: How many atoms of hydrogen are there in 1 kg of methane (CH4)?

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

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Q: There are two naturally occurring isotopes of europium, 151Eu(151.0 amu) and 153Eu(153.0 amu). If…

A: Given information:Two isotopes of europium, 151Eu (151.0 amu) and 153Eu (153.0 amu)Atomic mass of Eu…

Q: 8. How many moles of magnesium is 3.01 x 102² atoms of magnesium?

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

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Q: 6. How many hydrogen atoms are there in 0.75 mol of C,H10O?

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Q: What is the average mass, in grams, of one Zn atom?

A: Given :- Number of atoms of Zn = 1 atom  To calculate :-  Average molar mass of single atom of Zn…

Q: 3. What is the mass of 3.1 moles of zinc, Zn?

A: Mass = number of moles × molar mass

Q: How many grams are in a sheet of iron metal, Fe, containing 1.505 x 1023 atoms of Fe?

A: Mole is a SI unit which is used to measure the amount of substance present. Mole can be defined as…

Q: What is the mass, in grams, of (a) 6.33 mol of NaHCO3 and(b) 3.0 * 10-5 mol of sulfuric acid?

A: (a) formula weight of NaHCO3 = 84.0 amu using 1 mol NaHCO3  = 84.0 g NaHCO3

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".