Question

Convert 75.0 psi to atm
My work:
75.0psi x 1 psi/14.7 atm =5.10 atm

Not sure if this is set up right we are using dimensional analysis

Answer 1

You turned the factor upside down. Note that psi x psi/atm = (psi)^2/atm and that isn't the unit you want. You want the factor to cancel the unit you don't want to keep and keep the unit you want. So you want the psi of 75 to cancel the psi of the factor and that leaves atm.