How many atoms of carbon are present in

31.4 g of a compound that is 16.2% carbon, by weight?
Answer in units of atoms.

The mass is 31.4 g and it is 16.2%C; therefore, g C = 31.4*0.162 = ??

moles C = ??g/molar mass C = xx moles C..
1 mole of C atoms contains 6.022E23 atoms and you have xx moles C. _____ = # C atoms.

To find the number of atoms of carbon in a compound, we first need to calculate the number of moles of carbon present in the compound.

Step 1: Calculate the molecular weight of the compound
To do this, you need to know the molecular formula of the compound. Since the molecular formula is not mentioned in the question, we will assume the compound is a hydrocarbon (containing only carbon and hydrogen atoms). The molecular weight of a hydrocarbon is equal to the sum of the atomic weights of the carbon and hydrogen atoms in the compound.

The atomic weight of carbon is approximately 12.01 g/mol.

Step 2: Calculate the number of moles of carbon
To find the number of moles of carbon present in the compound, we divide the given mass of carbon in the compound (31.4 g) by the molecular weight of carbon (12.01 g/mol).

Number of moles of carbon = 31.4 g / 12.01 g/mol

Step 3: Calculate the number of atoms of carbon
Since 1 mole of any substance contains Avogadro's number of atoms (approximately 6.022 x 10^23 atoms), we can multiply the number of moles of carbon by Avogadro's number to obtain the number of atoms of carbon.

Number of atoms of carbon = Number of moles of carbon x Avogadro's number

Now we can substitute the given values:

Number of atoms of carbon = (31.4 g / 12.01 g/mol) x 6.022 x 10^23 atoms/mol

Calculating this equation will give you the number of atoms of carbon in the compound.

To find the number of atoms of carbon in 31.4 g of a compound, we need to follow these steps:

1. Calculate the mass of carbon in the compound:
Mass of carbon = (Percentage of carbon / 100) * Total mass of the compound
Mass of carbon = (16.2 / 100) * 31.4 g

Mass of carbon = 5.088 g (rounded to three decimal places)

2. Determine the molar mass of carbon:
The molar mass of carbon is approximately 12.01 g/mol.

3. Convert the mass of carbon to moles:
Moles of carbon = Mass of carbon / Molar mass of carbon
Moles of carbon = 5.088 g / 12.01 g/mol

Moles of carbon = 0.4239 mol (rounded to four decimal places)

4. Calculate the number of atoms of carbon using Avogadro's number:
Number of atoms of carbon = Moles of carbon * Avogadro's number
Avogadro's number is approximately 6.022 x 10^23 particles/mol.

Number of atoms of carbon = 0.4239 mol * 6.022 x 10^23 particles/mol

Number of atoms of carbon = 2.552 x 10^23 atoms (rounded to three significant figures)

Therefore, there are approximately 2.552 x 10^23 atoms of carbon present in 31.4 g of the compound.