how many helium atoms are there in a helium blimp containing 536 kg of helium?

Q: What is the mass of 4.91×10214.91×1021 platinum atoms?

A: For  calculating the mass of substance , we have the governing equation  m=NA×Molecular weight ,…

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

A:

Q: How many silicon atoms are there in 1.00g of silicon?

A: Given: Mass of silicon=1.00 g Mass of 1 mole of silicon=28.0855  g

Q: How many protons, neutrons, and electrons are in an atom of (a) 138Ba, (b) phosphorus-31?

A:

Q: (a) What isotope is used as the standard in establishing the atomic mass scale? (b) The atomic…

A: a)Atomic mass scale: It is relative scale used to determine the elements mass relative to…

Q: How many miles of gold atoms do 3.45 x 10^24 gold atoms constitute

A: This problem can be solved by knowing that one mole comprises of 6.022×1023 atoms.…

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: Differentiate between different isotopes of an element?

A: A number of atoms of some elements have been identified, which have the same atomic number but…

Q: How many atoms of neon are present in 1.30 moles of neon?

A:

Q: How many atoms are there in 2 mole of a calcium

A: Given that,  No. of moles of Ca= 2 mole No. Of atoms?

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: 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: if a penny is made of 2.56 grams of copper, how many atoms of copper are in the penny?

A: Answer:- This question is answered by using the simple concept of calculation of number of atoms…

Q: A 20.0 g sample of an element contains 3.89 x 1023 atoms.

A: Given:-  Number of atoms = 3.89 × 1023atoms Mass of sample = 20.0g

Q: How many protons, neutrons and electrons are present in an atom of 40Ca and 119Sn ?

A: The atoms considered are 40Ca and 119Sn.

Q: 2. How many Sulfur atoms would be present in 32.5 moles of Sulfur?

A: Here,  Questions given moles and apply the value of Na , calculate the no of atom Na value is…

Q: what are the grams in 6.15 x 10^22 aluminum atoms?

A: Ans  As we know that one mole of aluminium contains 6.023*1023 atoms So 23 g of aluminium contains…

Q: 2. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. What does…

A: Answer: 75 Proton and 110 Neutron. Given,Element of Rhenium (Re) exist as two stable isotopes and 18…

Q: How many silver atoms are there in 3.84g of silver?

A: 1 mole of any substance contains 6.023×1023 atoms.1 moles of silver atoms weigh 107.87 g.

Q: How many atoms are there in 182 g of Neodymium?

A: Atomic mass of Nd = 144.2 g/ mol

Q: If a penny is made of 2.56 grams of Copper, How many atoms of copper are in the penny?

A:

Q: How many Se atoms are there in a 82.1 gram sample of Se ?

A:

Q: oxygen atoms

A:

Q: How many atoms of sulfur are in 0.78 grams of Sulfur?

A:

Q: How many grams of sulfur are there in 2.01 atoms of sulfur?

A:

Q: An atom containing 19 protons, 20 neutrons, and 19 electrons has a mass number of?

A: Given, Number of protons = 19 Number of electrons = 19 Number of neutrons = 20

Q: How many atoms are contained in 100.5 g of liquid mercury, Hg?

A: Moles of Hg atoms = given mass molar mass of Hg=number of atoms of HgAvogadro's number  100.5…

Q: Calculate the mass, in grams, of sample.  7.9x10^21 uranium atoms

A: GIVEN: To solve: Mass in grams of uranium atom sample=?

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

A: Given information: Mass of silver = 3.78 g

Q: In a sample of nitrogen, there is 99.63% N-14 atoms and 0.37% of N-15 atoms. What is the atomic mass…

A:

Q: What is the mass in amu of a carbon-12 atom?  Why is the atomic weight of carbon reported as 12.011…

A: The mass in amu of a carbon-12 atom is 12amu.

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

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

Q: If a sample of silver contains 1.29×104 atoms of silver-107 and 1.20×104 atoms of silver-109, what…

A: The percentage of silver-109 in the sample can be calculated by using the formula Percentage of…

Q: How many helium atoms are in 541 kg of helium?

A:

Q: How many sulfur atoms are there in 6.40 molmol of sulfur?

A:

Q: How many helium atoms are there in a helium balloon containing (1.8x10^0) kg of helium?

A: Given :- mass of He = 1.8 × 100 kg  To calculate :- number of atoms of He  number of moles =…

Q: How many moles of neon would there be in 7.59 x 1025 neon atoms?

A: Given that : Atoms of neon = 7.59 x 1025 atoms Moles of neon =?

Q: how many atoms at there in 63.55 grams of copper?

A:

Q: Determine the mass of 3.01 × 10^20 atoms of Sulfur.

A:

Q: If you had 5.25 grams of Magnesium , how many atoms is that?

A:

Q: What is the mass in grams of 8.22x10^23 magnesium atoms, each having a mass of 24 amu?

A:

Q: How many atoms are there in 8.1 grams of chromium?

A: Given  Mass of Chromium   = 8.1 gram  Number of atom       = ? Molar mass of Chromium = 52 gram…

Q: 6. What is the mass of 6.20 x 1025 atoms of sulfur?

A: We have 6.2*1025 atoms of sulphur , we have to calculate the mass of given atoms of sulphur.

Q: What is the mass of (2.66x10^21) platinum atoms?

A: Given, Number of Platinum atoms = 2.66×1021

Q: How Many atoms are there in 1.4532 mole of copper?

A:

Q: What is the mass of 4.50 x 1044 Cu atoms?

A: Given :- number of Cu atoms = 4.50 × 1022 atoms  To calculate :- mass of Cu (in g)

Q: What is the mass (in grams) of one Ni-58

A: Given is number of atom = 1 Mole represent the quantity of fundamental particle.

Q: A sample of aluminum foil contains 5.70 x 1023 atoms. What is the mass of the foil?

A:

Q: What is the mass of 4.91×1021 platinum atoms?

A: Given:Number of platinum atoms = 4.91×1021.Molar mass of platinum = 195.084 g/mol.

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.