Need ! calculate the volume of each of the following gases at stp. show your work.
a. 7.6 mol ar
b. 0.44 mil c2h6
c. 3.6 mol nh 3

A. 170.24 dm³

B. 9.9 dm³

C. 80.6 dm³

Explanation:

Data Given:

no. of moles of Ar = 7.6 mol

no. of moles of C₂H₆ = 0.44 mol

no. of moles of NH₃ = 3.6 mol

Volume of each gas at STP = ?

Solution:

To calculate volume of gas at STP (Standard temperature and pressure) formula will be used

                          no. of moles = volume of gas / molar Volume

Rearrange the above equation:

                         Volume of gas = no. of moles x molar Volume . . . . . . (1)

where

molar volume at STP = 22.4 dm³/mol

Put value in equation 1

           Volume of Ar = 7.6 mol x 22.4 dm³/mol

           Volume of Ar = 170.24 dm³

Put value in equation 1

           Volume of C₂H₆ = 0.44 mol x 22.4 dm³/mol

           Volume of C₂H₆ = 9.9 dm³

Put value in equation 1

           Volume of NH₃ = 3.6 mol x 22.4 dm³/mol

           Volume of NH₃ = 80.6 dm³

personal, she chose to do it.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.