Calculate the number of atoms of Zn in a sample with mass = 2811 amu.

Q: A mass of 145 g of a certain element is known to contain approximately 3.64 x1024 atoms. What is the…

A: Let the molecular weight of the element is M gm/mol.  Moles = weight/mol. wt.  Or, moles = 145/M  We…

Q: If 4.18x10^22 atoms of element Y have a mass of 2.46g what is the identity of element Y

A:

Q: How many Sc atoms are there in 5.35 moles of Sc?

A:

Q: How many moles are there in 2.75 x 10^24 atoms of copper?

A: we know that one mole of copper contain Avogadro's number of atoms Avogadro's number= 6.023 × 1023

Q: What is the mass of 5.10*10^21 platinum atoms?

A: A mole represents 6.022x1023 particlesThe 6.022x1023 Number is also known as Avogdro's Number .It…

Q: what's the atomic mass units for 1 bratom with a mass of 1.31 x 10^ - 23

A: To find atomic mass unit  of 1 Br atom if mass of atom = 1.31 x 10-23 g

Q: An alpha particle (4He2+) has a mass of 4.00151 amu. What is the charge-to-mass ratio of an alpha…

A: First calculate the mass in grams and then divide the charge of the helium atom by the mass of alpha…

Q: Explain the difference between Z (the atomic number) and A (the mass number)?

A: Concept introduction: Atomic number and mass number are the basic properties of element. An atom…

Q: If mass # is 141 and the # of protons 58, what is the atomic symbol and the # of neutrons?

A: Given:The mass number  of atom = 141 The no of proton = 58

Q: A mass of 41.6 g of an element is known to contain 6.59 x 1023 atoms. What is the atomic mass of the…

A:

Q: ilver is composed of two naturally occurring isotopes: Ag-107 (51.839%) and Ag-109. The ratio of the…

A: First calculate the percent abundance of Ag-109.

Q: What is the mass of 4.97×1021 platinum atoms?

A: Mass has many units. Its SI unit is Kg. On atomic level, atomic mass unit, molar mass, molecular…

Q: Determine the number of atoms in a 1.00 mg sample of Carbon-14?

A:

Q: If an element, El, has two isotopes with the masses and abundances listed below: 72El: 72.1961 amu;…

A: The element that possesses distinct number for neutrons (might be less or more) as compared to its…

Q: Consider the following equation: The mass number of element X is: 226A + 15B → 80C + {x}X + 4 1n

A: The nuclear reaction is  226A + 15B → 80C + {x}X + 4 1n  Now , Total mass number in left hand side…

Q: A 64.36 g sample of XO2 contains 25.79 g of oxygen atoms. What is element X?

A: Given,      A 64.36 g sample of XO2 contains 25.79 g of oxygen atoms . To determine the identity…

Q: Tin has 10 stableisotopes. The heaviest, 124Sn, makes up 5.80% of naturally occurring tin atoms. How…

A: Given that,  124Sn isotope makes up 5.80% of naturally occuring tin atoms  Mass of tin sample = 57.0…

Q: What is the mass of 1.213 × 10^8 mol S?

A: Mass = 3.88× 109 grams

Q: Mass spectrometric analysis of potassium and argon atoms in a Moon rock sample shows that the ratio…

A: The ratio of number of argon atoms and number of potassium = 10.3 : 1 Half life of potassium = 1.25…

Q: What is the mass in 3.52 x 10^23 water molecules?

A: mass of 3.53 ×1023 molecules is 10.45g

Q: An unknown element X has the following isotopes: 52X (88.00% abundant), 4⁹X (8.00% abundant), 5⁰X…

A: The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by…

Q: How many atoms of tritium are in 1 kg of tritium water ³H₂O?

A: Number of mol = Mass/molar mass Number of atoms in 1 mol = 6.0224 x 1023

Q: An unknown element X has the following isotopes: ²⁵X (80.50% abundant, mass = 25.03 amu) and ²⁷X…

A:

Q: An atom consists of two isotopes, the first with an atomic mass of 15.8967 amu and the second with…

A: Atomic mass of first Isotope = 15.8967 amu Atomic mass of second Isotope = 16.8245 amu Average mass…

Q: What is the mass of a mole of electrons if one electronhas a mass of 9.11 × 1 0 -28 g?

A: Because, 1 mole=6.022×1023 molecules/particles Therefore, 1 mole of electron=6.022×1023 electrons

Q: Suppose a new element is found on an extraterrestrial planet, element J. Element J consists of two…

A:

Q: What is the mass of 1.213 × 108 mol S?

A: Given :-  Number of moles of S = 1.213 × 108 mol  To calculate :-  Mass of S

Q: How many silver atoms are there in 3.78 g of silver?

A: Given information: Mass of silver = 3.78 g

Q: How many grams of Xe are there in a sample of Xe that contains 8.97×1023 atoms?

A: First we have to determine the moles of xenon.

Q: If the mass of lithium 3 Li is 7.01600 amu, mass H= 1.00783 amu, and mass 1 in= 1.00866 amu, the…

A: The isotope given is 73Li.

Q: Calculate the precise mass of each ion to five significant figures. Unless otherwise indicated, use…

A: The ion given is – [CH3Br] + No isotope is indicated. Hence taking the most abundant isotopes of…

Q: What number of moles represents 2.0 × 1022 atoms of nickel?

A: Given Atoms of Ni = 2 x 1022 atoms

Q: what is the mass of 7.15 x 10^22 aluminum atoms?

A: Given, Number of Aluminium atoms = 7.15×1022

Q: Determine the mass of Strontium-86 (in u) given that the average atomic mass of Sr is 87.6126 u and…

A:

Q: What mass of magnesium contains the same number of particles as there are in 6g of carbon 12

A: Given,  Mass of C = 6g  What mass of magnesium contains the same number of particles as there are in…

Q: How many atoms are there in 2.5 moles of C4H10O2?

A: To find the number of atoms in 2.5 moles of C4H10O2, we need to use Avogadro's number, which is the…

Q: When an atom of U-235 is combined with a single neutron nuclear fission occurs resulting in an atom…

A:

Q: Calculate the mass, in grams, of a single platinum atom (mpt=195.08amu)

A: Atomic mass of platinum is 195.08 g/mol.

Q: What is the mass number of Hg from the periodic table?

A: Answer:- Mass number:- It is defined as the total number of proton and neutron or can be defined as…

Q: Calculate the precise mass of each ion to five significant figures. Unless otherwise indicated, use…

A: The ion is CH313Br+. The atomic mass of the most abundant isotope of hydrogen (H) and Bromine (Br)…

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.