Calculate number of moles and mlecules present in 0.032 mg of mithene (C=12 H=1)
I think you mean "methane"? If it is...
Methane's chemical formula is CH4. To get the moles of methane, we first get its molar mass by adding the masses of C and H. There are C atoms and 4 H atom:
CH4 = 12 + 4*1 = 16 g/mol
Then we divide the given mass by the molar mass:
0.032 mg = 0.000032 g
0.000032 g / (16 g/mol)
= 0.000002 mol or 2 x 10^(-6) mol
To get the molecules present, recall that 1 mole of a substance is equal to 6.022 x 10^23 particles / mol (Avogadro's number). We'll multiply this to the the moles:
6.022 x 10^23 / mol * 2 x 10^(-6) mol
= 1.2044 x 10^18 molecules of CH4
Hope this helps~ :)
Molecule mass of methane ,CH4=12+4=16g mol-1 16 g of methane = 1 mole there for,0.032mg =3.2×10_6 mole methane methane=12.044× 10 raised to17 moles of methane
Molar mass of methane,CH4=12+4=16g mal^-1
16g of methane=1mol
Therefore 0.032mg=10^-5g methane
=3.2*10^-5 mole=2*10^23
mole methane
Now,1mole of methane=6.022*10^23 molecules of methane.
Hence,2*10^-6mole of methane=12.044*10^17 molecules of methane.
To calculate the number of moles and molecules present in a given sample of substance, you need to use the concepts of molar mass and Avogadro's number. Here's how to calculate it step-by-step:
Step 1: Determine the molar mass of mithene (C=12, H=1).
The molar mass of carbon is 12 g/mol, and hydrogen is 1 g/mol. Since mithene has one carbon and four hydrogens, the molar mass of mithene will be:
(12 g/mol × 1) + (1 g/mol × 4) = 16 g/mol.
Step 2: Convert milligrams (mg) to grams (g).
To calculate the number of moles, you need the mass of the sample in grams. Since 1 g = 1000 mg, the mass of the sample is 0.032 mg ÷ 1000 = 0.000032 g.
Step 3: Calculate the number of moles.
The number of moles can be found using the equation:
moles = mass / molar mass.
moles = 0.000032 g / 16 g/mol = 2 × 10^-9 mol.
Step 4: Calculate the number of molecules.
The term "molecule" refers to the number of entities, such as atoms or ions, in a sample.
To convert moles to molecules, we use Avogadro's number, which states that there are 6.022 × 10^23 entities in one mole.
To calculate the number of molecules, use the equation:
molecules = moles × Avogadro's number.
molecules = 2 × 10^-9 mol × 6.022 × 10^23 mol^-1 = 1.2044 × 10^15 molecules.
Therefore, in 0.032 mg of mithene (C=12 H=1), there are approximately 2 × 10^-9 moles and 1.2044 × 10^15 molecules.