240 grams of titanium phosphate is added to 240 grams of calcium nitrate to react an produce titanium nitrate and calcium phosphate . How many grams of titanium II nitrate is produced theoretically

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

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 a! (2.9 x 10^-18 j) hope i could someone. : )