The best way to balance an equation is to balance one atom at a time.
You start with two Au atoms on the left, so you know the coefficient of Au on the right has to be 2. So at first we get,
Au2S3 + H2 --> 2Au + H2S
Then, notice you have 3 sulfur atoms on the left, so you need three on the right.
Our equation becomes
Au2S3 + H2 --> 2Au + 3H2S
Lastly, we now have six hydrogen atoms on the right, and only two on the left, so we assign a three to the H2 on the left
Au2S3 + 3H2 --> 2Au + 3H2S Is the balanced final equation.
Answer:
Chlorine has strong inter molecular forces than iodine
Explanation:
The given question is an incomplete question, the complete question is given below.
Use this equation to answer the questions that follow.
5 moles of oxygen gas are present. How many moles of 
will be produced with this amount of oxygen gas?
Answer : The moles of produced will be 3.33 moles.
Explanation : Given,
Moles of oxygen gas = 5 moles
Now we have to calculate the moles of .
The given balanced chemical equation is:
From the balanced chemical equation we conclude that,
As, 3 moles of 
gas react to produces 2 moles of gas
So, 5 moles of gas react to produces 
moles of gas
Therefore, the moles of produced will be 3.33 moles.
