Answer:Total energy gained by 15.71 g is 3090.6471 joules
Explanation:
Given:
Q = heat gained by the 15.71 gram mass of gold


c = specific heat capacity of gold = 0.1291
m = mass of gold =15.71 g

Heat gained by gold = 
=3090.6471 joules
The chemical reaction is expressed as:
2H2 + O2 = 2H2O
To determine the amount of oxygen used in the reaction, we use the amount of water produced and the relation of the substances in the reaction we do as follows:
209 g H2O ( 1 mol / 18.02 g ) ( 1 mol O2 / 2 mol H2O ) ( 32 g / 1 mol ) = 185.57 g O2
Answer:
Where is the results and what is the question or is there a picture
Explanation:
Answer:
3.4 mol C3H8
Explanation:
Balance: C3H8 + 5O2 → 3CO2 + 4H2O
Use a molar ratio to determine the amount needed.
13.6 mol H2O * 1 mol C3H8/4 mol H2O = 3.4 mol C3H8