Answer:
See explanation below
Explanation:
The question is incomplete, however, I found a question very similar to this, and I'm assuming this is the question you are asking to answer. If it's not, please tell me which one it is. Here's a tip for you to get an idea of how to solve.
Picture 1, would be the original question. Picture 2 is the answer of it.
Now, This is a E1 reaction where this type of reactions are taking place in two steps. The first step is the formation of the carbon cation, this step is always slow. The secon step is the addition of a nucleophyle, or, in this case, formation of a pi bond, and we get a alkene.
Hope this can help you
Answer:
17.689g
Explanation:
1: First, write out the equation you will follow:
Ca + S ⇒ CaS
2: Use the formula Mass = Mr x moles to work out the moles of both Ca and S - this will enable you to find the limiting reactant.
3: Moles Ca:
Moles = mass/ Mr = 15.3/ 40.1 = 0.382 moles.
4: Moles S:
Moles = mass/ Mr = 7.96/ 32.1 = 0.245 moles.
5: We now know S is the limiting reactant, and as there is a 1:1 ratio between S and CaS, there will also be 0.245 moles CaS.
6: Mass CaS:
Mass = Mr x moles = 72.2 x 0.245 = 17.689g
Answer:
5 g of H₂ are contained in the vessel
Explanation:
A typical excersise of conversion:
We determine molar mass of H₂.
This is a dyatomic molecule, as molar mass of H is 1g/mol, molar mass of H₂ will be 2g/mol.
Let's make the conversion of units:
2.5 mol . 2g/mol = 5 g
5 g of H₂ are contained in the vessel
The RFM (Relative Formula Mass) of the substance H2O2 is:
H2 = 1 x 2
= 2
O2 = 16 x 2
= 32
32 + 2 = 34
USE THIS FORMULA:
*Mass = Moles x RFM*
Part A:
Mass = Moles x RFM
= 2.5 x 34
= 85 g
(You can always rearrange this formula to suit the question)
Part B:
Moles = Mass/RFM
= 30/34
=0.8823529........ (Need a calculator haha)
=0.88 (Rounded up to 2 decimal places)
I hope I helped, ask if you have any questions.
