Question

What mass of CH will be made when 10.0 g of H reacts with 5.0 g of C?

Answer 1

Mass of CH = 5.46 g

Step-by-step explanation:

Given data:

Mass of H = 10.0 g

Mass of C = 5.0 g

Mass of CH = ?

Solution:

Chemical equation:

C + H → CH

Number of moles of H:

Number of moles = mass/molar mass

Number of moles = 10.0g / 1 g/mol

Number of moles = 10 mol

Number of moles of C:

Number of moles = mass/molar mass

Number of moles = 5.0g / 12 g/mol

Number of moles = 0.42 mol

Now we will compare the moles of H and C with CH.

C : CH

1 : 1

0.42 : 0.42

H : CH

1 : 1

10 : 10

Number of moles of CH produced by C are less it will act as limiting reactant.

Mass of CH:

Mass = number of moles × molar mass

Mass = 0.42 mol × 13 g/mol

Mass = 5.46 g