How many helium (He) atoms are there in (3.74x10^2) g of helium?

Q: Explain clearly what is meant by the statement “The atomic mass of gold is 197.0 amu.”

A: “The atomic mass of gold is 197.0 amu.” The explanation of the above statement has to be given…

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: 4. What is the mass of 2.5 moles of Nickel (Ni) atoms?

A:

Q: 12. How many grams are there in 1 x 1024 molecules of BC13?

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

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: How many grams of copper that consists of 1.54 x 1024 atoms of copper?

A: To convert atoms to grams,  Step I  -  Convert atoms to moles                  1 mol  = 6.022 × 1023…

Q: Why is the atomic weight of carbon reported as 12.011 in the table of elements and the periodic…

A: Mass of carbon is 12 amu

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 many moles of atoms are there in 2.12 x 10 43 atoms of Nickel?​

A: 1 mole = 6.022×1023 [ Avogadro's number ] If any metal consists of 6.022×1023 atoms it is said to…

Q: How many moles of Na are there in 1.28 x1025 atoms of Na?

A:

Q: In which of these compounds are there twice as many Oxygen atoms as Hydrogen atoms?

A: To find :- The compound having oxygen atoms two times more than the hydrogen atoms.   We can easily…

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: Calculate the mass, in grams, of 262 atoms of cesium, Cs (1 mol of Cs has a mass of 132.91 g).

A: Molar mass = 132.91g I mol of Cs contains 6.022×1023atoms  Therefore mass of 6.022 × 1023 atoms =…

Q: A given sample of ammonia, NH3, contains 3.75x1024 hydrogen atoms. What is the mass, in grams, of…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

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: How many atoms of sulfur are in 81 g of Na₂S₂O₃ ?  Atomic weights:  Na=22.99, S=32.07, O=15.99.

A:

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 6.022 * 1023 N atoms of mass 14.01 amu?

A: To determine the mass in grams of 6.022x1023 N atoms of mass 14.01 amu Given that: Mass of each atom…

Q: How many atoms of O are found in 1.00 x 10 2 g of K 2Cr 2O 7 ?

A: Number of atoms of Oxygen present in the given compound can be calculated as -

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

A: Atomic mass of Nd = 144.2 g/ mol

Q: What is the mass of 6.02 x 1023 atoms of carbon, C?

A: Concept is based on mole concept

Q: What is the mass of 6.02 x 1023 Cu atoms?

A:

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

A:

Q: If 4.20 x 1020 atoms of an element have a mass of 55.2 mg, what is the atomic weight of the element?

A: • 1 mole = 6.023 x 1023 molecules/atoms.• 1 mole = molar mass.• No. of mole = No. of atoms6.023 x…

Q: What is the relative atomic mass of silver given the following abundances of its 23. isotopes Ag =…

A:

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

A:

Q: How many moles are there in 2.17 x 1023 atoms of Au?

A:

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

A: Avogadro's number (N) = 6.022 x 1023 atoms/mole No of moles = No of atoms / N                    =…

Q: How many protons are in 2.08 x 10-21 g of F?

A: Atomic weight of F = 19 Given is Mass of F= 2.08 x 10-21 g Number of moles= given mass/ molar mass…

Q: What is the mass of 4.78 X 1024 NO2 molecules?

A: Given :-  Number of molecules of NO2 = 4.78 X 1024  To be calculated :- mass (in g)

Q: What is the mass of one atom of I? O 2.107 x 10 22 8. O 3.443 x 1023 O 4.745 x 10-22 g O 6.641x…

A: To find mass for one atom of an element, divide the atomic mass of an element by avogadro number. It…

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

A:

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: How many grams of Copper are in 9.03 x 1023 atoms of Copper (Cu)?

A: we have to calculate mass of copper in                               9.03×1023 atoms of copper…

Q: How many silver atoms are there in 5.71 moles of silver?

A:

Q: How many silver atoms are there in 3.86 gg of silver?

A: Given, The mass of silver = 3.86 grams. Number of atoms of silver in this amount are:

Q: How many atoms of nitrogen are there in a sample of (4.80x10^2) grams of N2(g)?

A:

Q: 3.97 x 10^24 molecules of NO has what mass

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: How many moles are there in 2.87 x 10^24 atoms of gold?

A:

Q: How many grams of Kr are there in a sample of Kr that contains 6.43 x 1023 atoms?

A: Mole is a unit of measurement. One mole of a substance is something that contains 6.022 x 1023…

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: Uranium (VI) fluoride (UFe) can be used for the enrichment uranium. What is the elemental…

A:

Q: How many Hydrogen atoms are there? 4H,0

A: We have given that  No. Of mole of H2O = 4  1 mole water contain 2 mole hydrogen atom and 1mole of…

Q: 4. How many grams are in 1.98 x 1021 atoms of Fe?

A: We have to calculate the mass of Fe.

Q: What would be the mass, in kilograms, of a block of graphite consisting of 1.55 x 1026 carbon atoms?

A:

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.