Question

A sample of C3H8 has 6.96 × 1024 H atoms. How many carbon atoms does the sample contain?

Answer 1

To find the number of carbon atoms in the sample of C₃H₈, we multiply the number of hydrogen atoms by 3/8.

Step-by-step explanation:

To determine the number of carbon atoms in a sample of C₃H₈, we need to find the mole ratio between carbon atoms and hydrogen atoms in the compound.

C₃H₈ is made up of 3 carbon atoms and 8 hydrogen atoms. So, the mole ratio is 3:8.

Given that the sample has 6.96 × 10²⁴ H atoms, we can use the mole ratio to find the number of carbon atoms by multiplying the number of hydrogen atoms by 3/8:

Number of carbon atoms = (6.96 × 10²⁴ H atoms) x (3/8)

= 2.61 × 10²⁴ C atoms.

Answer 2

A sample has 3.28 X 10^24 h atoms

so first we will find the moles of Hydrogen by putting values in formula
that is
. moles = no. of atoms/ Avogadro's no (NA) moles
= 5.446 we got this
now the ratio of Carbon and Hydrogen is: C = H
3 = 8
now multiply it with the moles
3/8 * 5.466 = 5.466 2.05 is the moles of C
. now:find the no of C atoms by this
= moles X NA
= 2.05 X 6.022 X 10^23
= 1.27 X10^2
now will find the mass of sampl:
so One mole of C3H8 = 3 moles of C 1/3 * 2.05 = 2.05 moles of C
0.68 moles of C3H8.
now the mass of C3H8 = moles X molar mass mass of C3H8
which is = 0.68 X 44 =
30.2 grams of C3H8