calculate the number of molecules in 200 gm of caco3.
mol wt of CaCO3 is 100g
so, 200g = 2 moles = 2*6.02*10^23 molecules.
reason for _______ earth is tilted 23 1/2 from a line perpendicular to its orbit, the length of daylight varies and because of the angle at which the sun's energy strikes a given location through the years
Number molecules in 200 g of CaCO3 are
To calculate the number of molecules in 200 grams of CaCO3 (calcium carbonate), you will need to use the following steps:
Step 1: Determine the molar mass of CaCO3.
The molar mass of a compound is the sum of the atomic masses of all the elements present in it. The atomic masses of carbon (C), oxygen (O), and calcium (Ca) are approximately 12 g/mol, 16 g/mol, and 40 g/mol, respectively. The formula of calcium carbonate (CaCO3) indicates that it contains one calcium atom, one carbon atom, and three oxygen atoms.
So, the molar mass of CaCO3 = (1 x molar mass of Ca) + (1 x molar mass of C) + (3 x molar mass of O)
= (1 x 40 g/mol) + (1 x 12 g/mol) + (3 x 16 g/mol)
= 100 g/mol
Step 2: Calculate the number of moles of CaCO3.
The number of moles can be calculated using the formula:
Number of moles = Mass (in grams) / Molar mass (in grams per mole)
In this case, Mass = 200 g
Molar mass = 100 g/mol
Number of moles of CaCO3 = 200 g / 100 g/mol
= 2 mol
Step 3: Use Avogadro's number to calculate the number of molecules.
Avogadro's number (6.022 x 10^23) represents the number of atoms or molecules in one mole of substance.
Number of molecules of CaCO3 = Number of moles x Avogadro's number
= 2 mol x 6.022 x 10^23 molecules/mol
= 1.2044 x 10^24 molecules
Therefore, there are approximately 1.2044 x 10^24 molecules of CaCO3 in 200 grams.