One inch equals 2.54 centimeters. What conversion factor is useful from converting centimeters to inches?

Can someone me with 1 to 4 plz. fast

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

An unknown substance has been shown to have metallic bonds. which of the following is most likely a property of this substance? a. low conductivity b. low boiling point c. high malleability d. high solubility in water