How many atoms are in a 1.8 mol sample of Magnesium (Mg)?      1.5 x10241.5 x1024 atoms Mg   2.99 x 10−242.99 x 10−24 atoms Mg   1.08 x 10241.08 x 1024 atoms Mg   6.02 x 10236.02 x 1023 atoms Mg

Q: 16. How many grams of water (18.02 g/mol) would contain 5.64 x 1024 hydrogen atoms? c. 84.4 g d.…

A: Given, Number of H atoms = 5.64*1024 atoms

Q: many moles are in 38.9 grams of Al? Atomic weight of Al=26.98

A: Mass of Al = 38.9 g Atomic weight of Al = 26.98 g/mol Mole(n)= Mass(m)/Atomic weight

Q: Determine the number of representative particlesin each substance.a. 4.45 mol of C 6 H 12 O 6…

A: Representative particles are the smallest units of a substance that has retained all the properties…

Q: How many atoms are in .452 moles of carbon? 1.33 x 1024 atoms 2.72 x1023 atoms 3.27 x 1024 atoms…

A: We are having 0.452 moles of carbon , we have to calculate the number of atoms in this much moles of…

Q: Calculate the number of atoms in a 4.70×1034.70×103 g sample of lithium.

A: 1 mol of a sample contains 6.02×1023 atoms. Number of moles of sample can be determined using the…

Q: How many moles of iron is present in a 2.53-g sample of an oxide of iron that is 27.64% O by mass?…

A:

Q: What is the mass of 3.119 moles of Ca(OH)2? a.  231.1 g b. 462.1 g d. 74.10 g c. 4.209 x 10^-2 g

A: Given, moles of Ca(OH)2 = 3.119 moles. We have to calculate how many grams of Ca(OH)2 are present…

Q: 5. In a 3.7-gram sample, there are (A) 1.1 x 1022 atoms of gold (B) 3.2 x 1025 atoms of gold (C) 4.4…

A: Number of Mole-Ratio of given mass of substance to the molar mass of substance is called number of…

Q: 7. How many sodium atoms is equal to five moles of the atoms? а. 5 b. 3.011 x 1024 с. 500 d. 6.022 x…

A: Mole represent  amount of substance present in any matter.

Q: Which sample contains the greatest number of atoms? 54.7 g V 51.2 g Mn 203 g Bi

A: To find number of atom we have to calculate number of moles first. Moles= given mass/molar mass…

Q: Calculate the number of atoms in each element. a. 25.8 g of Hg b. 0.0340 g of Zn c. 150 g of Ar d.…

A:

Q: Assume the atomic mass of element X is 22.99 amu. A 22.42−g sample of X combines with 123.73 g of…

A: Mass of X = 22.42 g Mass of Y =123.73 g Atomic mass of element X = 22.99 amu Atomic mass of element…

Q: How many silver atoms are contained in 1.75 moles of silver?

A: 1 mole of a substance is equal to the Avogadro number of atoms.  1 mole =6.022 x 1023 atoms.

Q: Aluminum has a density of 2.70 g/cm3 and molar mass of 26.98 g/mol. Its atomic radius is 143 x 10 –…

A: Answer:

Q: B How may oxygen atoms are in 225 g of oxygen gas? 4.23 x 102+ b. 6.84 x 10²4 8.47 x 10²4 1.69 x…

A: To calculate the number of oxygen atoms in 225 g of Oxygen gas.

Q: One mole of oxygen molecule (02) contains how many atoms of oxygen? a. 6.022 × 1023 O b. 1,6021 ×…

A: We have to tell the no. Of oxygen atom in 1 mole

Q: How many grams of gold (Au; atomic mass = 197.0 g/mol) contains 2.5 x 1020 gold atoms?

A: Number of moles = mass/molar mass  Mass = moles × molar mass  Molar mass of Au = 197.0 g/mol

Q: What is the mass of one atom of I? O 4.745 x 10-22 g O 3.443 x 10-22 g O 6.641x 10-23 g O 2.107 x…

A:

Q: Which sample contains the greatest number of atoms? O 102 g Ag O 189 g Ir O 18 g O O 53 g Fe

A: The number of moles is defined as the ratio of a given mass to molar mass. No. of moles =Given…

Q: "If you begin with 202.2 grams of aluminum, how many grams of aluminum oxide can be formed? 4 Al(s)…

A: Given, 4 Al(s) + 3 O2(g) → 2 Al2O3(s) mass of aluminium (Al) react = 202.2 g mass of aluminum oxide…

Q: A sample of Ca3(PO4)2 contains 2.1 x 1024 phosphorous atoms. How many oxygen atoms are in the…

A: There are 8 moles of oxygen atoms per 2 moles of Phosphorous atoms in 1 mole of Ca3(PO4)2 which…

Q: Determine the number of moles of hydrogen atoms in each sample. a. 0.0885 mol C,H10 c. 2.4 mol C,H12…

A: a. 0.0885 mol C4H10 1 mol of C4H10 contains 10 mol of H. Thus, 0.0885 mol C4H10 will contain 10 x…

Q: The compound, X,03, contains element .5 X and oxygen atom combined in a ratio of 2.17 grams of X to…

A: The mass ratio of atom X to oxygen in X2O3 is = 2.17: 1 In the second compound, the mass ratio of…

Q: The total number of atoms in Ca(OH)2

A: Ca(OH)2 is a base and its name is Calcium hydroxide. Atom is the smallest entity of any element and…

Q: Calculate the number of atoms of silver that are in 0.212 moles of silver. (Avogadro's number = 6.02…

A: Avogadro’s number, one mole of any substance (defined as its molecular weight in grams), is equal to…

Q: There are 1.5 x 1022 atoms in A. 0.025 mol of gold B. 4.0 g of helium C. 2.5 x 1044 moles of copper…

A: Number of atoms = moles of element X Avogadro's number  where Avogadro's number = 6.022 X 1023

Q: The total number of atoms in one mole of caffeine. Recall that the formula of caffeine is:…

A: We find the total number of atoms with the help of the total atoms present in the chemical formula,…

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: We have to calculate molar mass of metal and it's identity.

Q: Use the LAW OF CONSERVATION OF MASS to fill out the missing information in the table below HCI +…

A: Given that : We have to use the law of conservation of mass to calculate the mass of NaOH :

Q: 5) 25 grams of PbSO4 is equivalent to how many moles? a) 0.0824 b) 1.21 c) 1.56 d) 1.98

A: Given data: Grams of PbSO4= 25 g. To find: The number of moles of PbSO4.

Q: Determine the number of atoms in a sample of 2.26 g Hg. O 6.78 x 10 21 atoms O7.53 x 10 22 atoms O…

A: Number of moles of a chemical element or a compound is used to measure the amount of element or…

Q: How many fluorine atoms are present in 117.99 g of sulfur hexafluoride? O a. 4.865 1024 fluorine…

A: The molecular formula of sulfur hexafluoride is SF6. The mass of sulfur hexafluoride is = 117.99 g…

Q: What is the mass of one atom of I? O 6.641 x 10-23 g O 4.745 x 10-22 g O 2.107 x 10 22 g O 3.443 x…

A: To determine the mass of 1 atom of I, do the following : 1) Determine molar mass of the substance.…

Q: Amounts of tin may be alloyed with copper to produce bronzes of varying composition and properties.…

A: Given :  Mass of bronze = 8.9394 g  Mass of mixture of oxides = 11.2311 g

Q: A sample of trifluoroacetic acid, C,HF,02, contains 25.3 g of fluorine. Calculate the mass of the…

A: One molecule of C2HF3O2 contains 2 atoms of carbon, 1 atom of hydrogen, 3 atoms of fluorine and two…

Q: The atomic mass of titanium (Z = 22) is 47.87 amu. How many atoms are present in 45.5 g of titanium?…

A: Mole of a substance or a mole of a particles is defined as exactly 6×10^23 particles which may be…

Q: How many atoms are in each elemental sample? 16.1 g Sr 26.4 g Fe 9.81 g Bi

A:

Q: What is the mass of 4.63 x 1012 atoms of Fe? 9.76 x 10-10 g O 1.62 x 10 10g O 1.08 x 10-10 g O 2.73…

A:

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A:

Q: How many atoms of neon are present in 1.45 moles of neon? 8.73 x 1024 atoms 8.73 x 1023 atoms 6.02 x…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: What is the mass of 1.48 Mol of potassium sulfide (K2S)? A. 12.0g B. 0.0134g C. 195g D. 74.5g…

A: Solution The mole conception could be a convenient methodology of expressing the quantity of a…

Q: number of atoms in a 3.37×1033.37×103 g sample of carbon

A: 3.37×1033.37×103 g sample of carbon = 358693.061 g sample of carbon = 3.58 x 105 g sample of carbon

Q: Čalculate the mass of 1.92 x 1018 atoms of Mg. O 2.73 x 10 10 g O 8.96x 10:5 g O 1.62 x 10-4g O 7.75…

A:

Q: How many atoms are there in 3.33 moles of strontium? * 2.00 x 1024 atoms * 3.21 x 1032 atoms * 1.11…

A: GivenMoles of strontium = 3.33 moles Molar mass of strontium = 87.62 g/moleNo of atoms in 3.33 moles…

Q: Calculate the number of grams of lead contain 1.2 x 1024 atoms of lead.

A: Given: lead contain 1.2 x 1024 atoms of lead. To find: Calculate the number of grams of lead contain…

Q: 1A 2A 8A Atomic Number 1 E ЗА C 1 W 4A 5A 6A 7A G Zy 6. 4. K V P. Ad 8. 6. 10 11 12 13 14 15 Q U H.…

A: Amount of product formed is defined with the help of Limiting reagent using stoichiometric…

Q: What is the mass of 4.63 x 1012 atoms of Fe? O 8.96 x 10-10 g O 4.29 x 10-10 g O 2.73x 10-10g O 1.62…

A:

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.