Calculate the number of coulombs of positive charge in 263 cm3 of (neutral) water. (hint: a hydrogen atom contains one proton; an oxygen atom contains eight protons.)

Since, hydrogen atom consist of one proton and an oxygen atom consist of eight protons.

Now, density of water is 1 g/ml

Given volume = = 263 mL

So, weight of water = 263 g

Number of moles of water =

=

= 14.61 g/mol

Number of protons =

=  

As, charge on one proton =

Thus, total charge =

=

=  

Thus, is the total number of coulombs of positive charge.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.