At a pressure of 2.0 atm, a gas tank contains 5.0 kg of hydrogen gas at a constant temperature. The hydrogen gas was then replaced with 12.0 kg of oxygen gas. Find

i. the amount of hydrogen and oxygen gas in moles

(Given, O = 16; H = 1; R = 8.315 J/mol. K)​
ii. the pressure exerted by oxygen gas.

Apossible explanation for a set of facts that can be tested by further investigation is called

The two required components for a generator

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?