How does an atom become a positively charged ion? a. by gaining one or more electrons b. by gaining one or more neutrons c. by losing one or more electrons d. by losing one or more neutrons

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.