8. A sample of a compound contains 15.60 g Mg and 10.27 g O. How many g Mg are in another sample of the compound that contains 12.07g O?

Q: What is the number of moles of hydrogen gas in the sample

A: The number of moles of hydrogen gas can be calculated by the ideal gas equation which is given by…

Q: How many grams of C are present in 4.19 grams of carbon tetrafluoride?   How many grams of carbon…

A: Given   (i)   Mass of CF4  = 4.19 gram       Mass of carbon = ? (ii)  Mass of F = 4.61 gram…

Q: How many atoms are present in 58.93 g of cobalt? atoms

A: 1.  No.of moles = given mass / molecular mass  Molecular mass of Co = 58.93 g/mol   2. 1 mol = 6.022…

Q: How many moles of titanium are contained in 71.4 g?

A:

Q: How many moles of tin atoms are in a pure tin cup with mass of 38.1 g? a

A: Given data: The mass of tin atoms = 38.1 g. To find: The number of moles of tin atoms.

Q: A grain of maize pollen has an average mass of 250 ng. How much would a mole of these pollen grains…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: How many GRAMS of lead(II) nitrate are present in 3.98 moles of this compound ? grams.  How many…

A:

Q: How many atoms of Pb are present in 254 grams Pb?

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

Q: alculate the number of moles of He atoms present in 4.65 g of H

A: Number of moles = weight / atomic weight    Given ,  weight = 4.65g Atomic  weight of He = 4 g/mol

Q: Morphine (molar mass = 285.37 g/mol) is a narcotic %3D painkiller. How many moles of morphine are…

A: We know that : moles = weight of substance/molecular weight of substance  Or, moles (n) = weight…

Q: How many moles of barium are contained in 112.6 g of barium?

A:

Q: A compound contains 30.4 g of nitrogen and 69.6 g of oxygen by mass. What is the chemical formula of…

A: Given : mass of Nitrogen i.e N = 30.4 g And mass of Oxygen i.e O = 69.6 g

Q: In N2O , 28 g N combines with 16  g O. Determine grams of O and N in NO2

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

Q: A sample contains 0.687 mol H3PO3. What is the mass of H3PO3in the sample?

A: Given that, Moles of H3PO3 = 0.687 mol  Molar mass of H3PO3 = 82 g mol-1 Then,

Q: What mass of CaCl2 will contain 49.5 g of chlorine?

A: One mole of the given compound CaCl2contains two moles of chlorine. In terms of mass, 110.98 g of…

Q: When the substance shown below burns in oxygen, the products are carbon dioxide and water. How many…

A:

Q: How many atoms of Cu are present in 35.4 g of Cu?

A:

Q: How many molecules of H2O are contained in 360 g of H2O? How many atoms of H?

A:

Q: A new computer chip contains 4.71×1022 Si atoms. Determine the mass (in grams) of the silicon…

A: 1 mole of any substance contains avagadro number of atoms i.e.6.022×1023 atoms.  6.022×1023 atoms of…

Q: How many moles of Magnesium are in 0.136 grams MG?

A:

Q: How many atoms are present in 2 moles of Fe ?

A:

Q: A chemical reaction was used to produce 1.61 moles of copper (II) bicarbonate, Cu(HCO3)2. What mass…

A: Given data:

Q: How many grams of C are present in 4.84 grams of carbon dioxide ?

A: We have to find grams of C are present in 4.84 grams of carbon dioxide

Q: Consider 1.00 g of Copper (Cu) metal. How many Cu moles are present in this sample? How many Cu…

A: Since moles of element = mass of element / Atomic mass of element  Atomic mass of Cu = 63.5 g/mol…

Q: Calculate the mass in grams of lead (IV) acetate (443.3 g/mol) that will have 86g of carbon atoms.

A: Given, Mass of C = 86 g Molar mass of lead acetate = 443.3 g/mol

Q: How many chlorine molecules are contained in a 151.34 g sample of chlorine?

A: To know the number of molecules, first we have to know the number of moles. Moles = Given mass /…

Q: Solid lithium hydroxide is used to remove exhaled carbon dioxide from space vehicles by forming…

A:

Q: Determine the mass, in grams, of 0.790 moles of Mn (1 mol of Mn has a mass of 54.94 g).

A: The answer to the following question is given as -

Q: A sample of a compound containing only magnesium and oxygen is found to have 194g Mg and 256 g of O…

A: The percentage of Magnesium and oxygen are calculated as,

Q: A sample of a compound containing only S and Cl contains 2.72g S and 6.04g Cl.  Another sample of…

A: A sample of a compound containing only S and Cl contains 2.72g S and 6.04g Cl. Another sample of the…

Q: A certain nut crunch cereal contains 11.0 grams of sugar (sucrose, C12H22O11) per serving size of…

A: The relation between mass and moles is shown below:Mass in g = (Number of moles) (molar mass)The…

Q: Use compound formulas to determine element composition. A sample of pentanol, C5H120, contains 1.69…

A:

Q: A 78.0-g sample of an unknown compound contains 12.4 g ofhydrogen. What is the percent by mass of…

A: Given: Weight of the compound = 78 g Weight of hydrogen = 12.4 g The calculation of the % by mass is…

Q: 1. How many grams of Mg are present in 4.04 grams of magnesium phosphate? grams Mgt. Mg²",

A: Given: Mass of magnesium phosphate (Mg3(PO4)2) = 4.04 g Molar mass of magnesium phosphate = 262.8582…

Q: How many molecules of NO are in a 22.5 g sample of the compound?

A:

Q: 1.75 x 1023 atoms Pb converted to grams

A:

Q: How many grams of Al3+ are present in 4.12 grams of aluminum iodide?  How many grams of aluminum…

A: To find the grams, number of moles should be calculated.  Moles = Given mass/ molar mass

Q: A 1.30 g sample of titanium chemically combines with chlorine gas to form 5.16 g of titanium…

A:

Q: 30. A sample of a compound containing only S and Cl contains 2.72g S and 6.04g Cl. Another sample of…

A: given data = a sample compound only containing S and Cl S = 2.72 g, Cl = 6.04 g another sample of…

Q: How many grams of BrBr are in 305 g CaBr2? mass:

A:

Q: How many grams of Ca are present in 3.28 moles?

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: How many grams of carbon are in 368.3 g of carbon tetrachloride? mass:

A: Mass of carbon tetrachloride = 368.3 g  Mass of carbon = ?

Q: 9) How many molecules of SO, are in 200 g of SO,?

A:

Q: 7. A compound contains 30.4 g of nitrogen and 69.6 g of oxygen by mass. What is the chemical formula…

A:

Q: How many grams of Mg are in 523 g of

A: Magnesium oxide formula is MgO and it's molecular mass = 24 + 16 = 40 g  We have to calculate mass…

Q: Determine the mass, in grams, of 0.295 moles of Mn

A: Given :- number of moles of Mn = 0.295 mol  To calculate :- mass of Mn (in g)

Q: How many grams of C are present in 1.66 grams of carbon tetrachloride?  how many grams of carbon…

A: To calculate the mass of constituents present in a compound, we must have the molar mass of…

Q: ) How many grams of MgI2 is present in a 0.4745 g sample that is 53.21% MgI2 (278.11 g/mol)? B)…

A: Weight of sample = 0.4745 gm (w/w)% = 53.21 % Molar mass of MgI2 = 278.11 g/mole Molar mass of AgI =…

Q: How many atoms of C are present in 22.3 g of C?

A:

Q: How many grams of sugar C12H22011 that consists of 1.25 x 1024 atoms of carbons? Molar mass of…

A: Number of atom of carbon = 1.25 × 1024 atoms Number of atoms of carbon = number of moles × Avogadro…

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.