In a reaction, hydrogen gas is produced from 12.5 grams of phosphoric acid reacts with 15.7 grams of lithium. What volume will the hydrogen that is produced fill if the temperature is 20°C and the pressure is 876 mm Hg?

answer; protein;

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.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying