If 5.13 L of hydrogen gas, measured at a temperature of 10.0 degrees Celsius and a pressure of 83.5 kPa is burned in excess oxygen to form water, what mass of oxygen (measured at the same temperature and pressure) will be consumed? Assume temperature and pressure remain constant.

indium, and thallium have three electrons i think

the answer would be a

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.