How many molecules are in 0.220 grams of CO2?

Q: How many moles are in 1.79x10^24 molecules MgCl2?

A: No. of moles = given no. of particles/Avogadro number

Q: 3.98 mgHgO

A: Mass of HgO = 3.98 mg    = 3.98 ×10-3 g Molar mass of HgO = 216 g/mol

Q: A 55-kg woman has 7.5 × 10−3 mol of hemoglobin (molar mass = 64,456 g/mol) in her blood. How many…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance. It is…

Q: How many molecules are in 3.1x10^-3 g of C9H8O4?

A:

Q: A chemist weighs 50.0 grams of solid NaOH. a) How many moles of NaOH are in the sample? [ Select ]…

A:

Q: For the chemical reaction,   2NaOH+H2SO4⟶Na2SO4+2H2O2NaOH+H2SO4⟶Na2SO4+2H2O   what mass of…

A: The reaction is :  2 NaOH + H2SO4 ==> Na2SO4 + 2 H2O  Moles of water given = 4.87 mol  Molar mass…

Q: How many moles of NaOH are there in 125.0 mL of 0.445 M NaOH?

A: Molarity can be calculated as follows: Molarity=No. of molesVolume

Q: A 0.00215-g sample of polystyrene, a polymer composed of carbon and hydrogen, produced 0.00726 g of…

A: Empirical formula refers to the formula of a compound in which the elements are present in the…

Q: How many moles of KClO3 are needed to make 3.50 moles of KCl?

A: The corresponding reaction can be written as, 2KClO3→2KCl+3O2

Q: Wine is approximately 12% ethanol (CH3CH2OH) by volume. Ethanol has a molar mass of 46.06 g/mol and…

A:

Q: What mass in grams are in 5.32x10^22 molecules of CO2? For some reason, I'm getting confused on how…

A:

Q: 3. A sample of sandstone consists of silica, SiO2, and calcite, CaCO3. When sandstone is heated, the…

A: The decomposition of calcite yields calcium oxide and carbon dioxide gas.

Q: True or False? One mole of molecular O2 = 6.02 x 1023 O2 molecules. Mass of O2 in 100g of CO2 =…

A:

Q: Elemental analysis is sometimes carried out by combustion of the sample. For a hydrocarbon, the…

A:

Q: How many molecules (not moles) of NH3 are produced from 3.70×10−4 g of H2?

A:

Q: A beaker holds 4 x10^23 molecules of H2O. How many moles of H2O are in the beaker? Round to the…

A: The provided molecules of H2O=4×1023 molecules According to the Avagadro one mole of any substance…

Q: Naphthalene, the active ingredient in one variety of mothballs, is an organic compound that contains…

A: Given, Mass of CO2 = 69.00mg Mass of H2O = 11.30mg Mass of naphthalene = 20.10mg

Q: In a bottle of soda, there is 0.28 mole CO2. How many grams of CO2 are in the bottle?

A: Molar mass of CO2 = 44.01 g / mol Therefore, mass of 0.28 mole CO2 = 0.28 x 44.01 = 12.32 g

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.