Calculate the number of hydrogen atoms in 20.0 g of CH3OH
How many moles of CH3OH is 20g?
multiply that by avagradros'number, that is the number of molecules of CH3OH, then multiply that by 4, the number of H in each molecule.
7.715
To calculate the number of hydrogen atoms in a compound, we need to know the molecular formula of the compound. In this case, the compound is CH3OH, which is methanol.
Step 1: Find the molar mass of CH3OH
Molar mass of C = 12.01 g/mol
Molar mass of H = 1.01 g/mol
Molar mass of O = 16.00 g/mol
Total molar mass of CH3OH = (12.01 * 1) + (1.01 * 4) + (16.00 * 1) = 32.04 g/mol
Step 2: Calculate the number of moles of CH3OH
Number of moles = Mass / Molar mass
Number of moles = 20.0 g / 32.04 g/mol = 0.624 mol
Step 3: Determine the ratio of hydrogen atoms to CH3OH molecules
From the molecular formula CH3OH, we can see that there are 4 hydrogen atoms per 1 CH3OH molecule.
Step 4: Calculate the total number of hydrogen atoms
Total number of hydrogen atoms = Number of moles of CH3OH * (4 hydrogen atoms / 1 CH3OH molecule)
Total number of hydrogen atoms = 0.624 mol * 4 = 2.496
Rounded to the nearest whole number, there are approximately 2.5 hydrogen atoms in 20.0 g of CH3OH.
To calculate the number of hydrogen atoms in 20.0 g of CH3OH (methanol), you will need to use the formula:
Number of moles = Mass / Molar mass
First, you need to determine the molar mass of CH3OH. The molar mass of carbon (C) is 12.01 g/mol, the molar mass of hydrogen (H) is 1.01 g/mol, and the molar mass of oxygen (O) is 16.00 g/mol.
For CH3OH:
(1 × C) + (4 × H) + (1 × O) = (1 × 12.01 g/mol) + (4 × 1.01 g/mol) + (1 × 16.00 g/mol) = 32.04 g/mol
Now, you can use the formula to calculate the number of moles:
Number of moles = Mass / Molar mass
Number of moles = 20.0 g / 32.04 g/mol
By dividing, you will get the number of moles of CH3OH in 20.0 g:
Number of moles = 0.624 moles
Next, you need to calculate the number of hydrogen atoms. In one molecule of CH3OH, there are 4 hydrogen atoms. So, we can use the Avogadro's number (6.022 × 10^23) to convert moles to atoms.
Number of hydrogen atoms = Number of moles × Avogadro's number × Number of hydrogen atoms in one molecule
Number of hydrogen atoms = 0.624 moles × (6.022 × 10^23 atoms/mol) × 4 atoms
By multiplying, you will find the number of hydrogen atoms:
Number of hydrogen atoms = 1.895 × 10^24 hydrogen atoms
Therefore, there are approximately 1.895 × 10^24 hydrogen atoms in 20.0 g of CH3OH.