Find moles of atoms in 9.00g of Magnesium nitrate.
And please tell me method of typing molecular formula of any compound as of water or etc.
mols = grams/atomic mass = ?
Water is H2O but I don't know what you mean by a "method".
N=n×NA×N'
N=no of atoms/ions/molecules/ions
N'=desired no of atoms/ions/molecules/bonds/electrons in one unit of the sample
n=no of Moles
NA=6.02×10*23
To find the number of moles of atoms in a given amount of a compound, such as Magnesium nitrate (Mg(NO3)2), you need to follow these steps:
1. Determine the molar mass of the compound: The molar mass is the sum of the individual atomic masses of all the elements in the compound. For Magnesium nitrate, you have:
- Magnesium (Mg) with a molar mass of 24.31 g/mol
- Nitrogen (N) with a molar mass of 14.01 g/mol
- Oxygen (O) with a molar mass of 16.00 g/mol
Multiply the molar mass of each element by the number of atoms of that element in the compound and add them together:
Molar mass of Mg(NO3)2 = (24.31 g/mol × 1) + (14.01 g/mol × 2) + (16.00 g/mol × 6)
= 24.31 g/mol + 28.02 g/mol + 96.00 g/mol
= 148.33 g/mol
2. Convert the given mass of the compound to moles: You have 9.00g of Magnesium nitrate. To convert grams to moles, divide the given mass by the molar mass of the compound:
Moles of Mg(NO3)2 = 9.00g ÷ 148.33 g/mol
≈ 0.0606 mol
Therefore, there are approximately 0.0606 moles of Magnesium nitrate in 9.00g.
As for typing the molecular formula of any compound, follow these steps:
1. Determine the elements in the compound along with their respective chemical symbols. For example, water is composed of Hydrogen (H) and Oxygen (O).
2. Determine the number of atoms of each element present in the compound. In the case of water, there are 2 Hydrogen atoms and 1 Oxygen atom.
3. Combine the elements and their respective atom counts using subscript numbers. In the case of water, the molecular formula will be H2O, where the subscript 2 represents the two Hydrogen atoms.
Note: It is essential to consider the correct ratio of atoms in the compound when typing the molecular formula.