A 2.25 mol sample of an element has a mass of 51.8 g. What is the element?

Q: percent

A: CuO  + H2 ------------------ Cu  + H2o  Mm of CuO = 79g No of mole of Cu is = 4.7/79= 0.21mol From…

Q: In what mass units are the average atomic mass and molecular mass expressed? What is the value of…

A: The average atomic mass and molecular mass is expressed in atomic mass unit (amu). It is defined as…

Q: Use the following terms to complete the statement: 6.02 x 1023 molecules 6.02 x 1023 atoms 4 atoms…

A: One mole of an element contain Avogadro's number 6.02×1023 of atoms of that element. Therefore, 1…

Q: How many moles of gold are present in a sample containing 7.50 x 1024 atoms of gold?

A: Given- Number of atoms of gold = 7.50 ×1024 atom

Q: Determine the number of atoms in 77.0 grams of bromine,  Br ( The mass of one mole of bromine is…

A: Number of moles of a substance is equal to the mass of the substance divided by its molar mass.

Q: How many grams of F are there in 4.29 moles of F?

A:

Q: How number of F atoms in 2.62 moles of F2?

A:

Q: Convert the following to mass in grams   4.25 x 1024 atoms N

A:

Q: Determine the mass, in grams, of 0.710 moles of S (1 mol of S has a mass of 32.07 g).

A:

Q: 295 mportant para question Which sample contains the greatest number of atoms. A sample of Ge that…

A: Avogadro's Number NA  => Avogadro's number, NA, represents the number of atoms or molecules that…

Q: How many atoms of calcium are in 1.00 g?

A: Given  Mass of calcium    = 1 gram  Number of atoms = ?

Q: How many atoms are in 55 grams of Aluminum (Al)?

A: Given , Mass of Al= 55 g Molar mass of Al= 26.982 g/mol Avogadro's number= 6.022×10^23

Q: In an experiment, the reaction of 100.0 g of iodine produced 144.9 g of a compound formed from…

A: The mass of iodine is = 100.0 g The mass of the compound of iodine and fluorine is = 144.9 g The…

Q: Determine the mass, in grams, of 0.575 moles of I (1 mol of I has a mass of 126.90 g).

A: Molar mass of I = 126.9 g

Q: The atomic mass of cobalt is 58.993u. What is the mass of cobalt sample that contains 0.763 moles of…

A: No of moles =given moles/molar mass

Q: One mole of calcium contains____calcium atoms.

A:

Q: How many moles of mercury are in 17.140 grams of mercury?

A: Atomic number of mercury is ----  80 Atomic mass of mercury is ----- 200.59 g Since atomicity of…

Q: You have 15.31 g of an unknown compound. Through analysis, you have determined that this sample…

A: Mass percent can be calculated as follows:

Q: Determine the mass, in grams, of 0.675 moles of S (1 mol of S has a mass of 32.07 g).

A:

Q: What is the mass of one mole of Sg?

A: Mass of one mole of any element means it's molar mass

Q: What is the mass of 2.561 mol of gold?

A: A pinch of salt contains as many particle of NaCl that cannot be counted as such. The unit Mole (…

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.