Answer:
72.4%
Explanation:
Step 1: Write the balanced equation
2 Cu + S ⇒ Cu₂S
Step 2: Calculate the theoretical yield, in moles, from 0.0970 moles of Cu
The molar ratio of Cu to Cu₂S is 2:1.
0.0970 mol Cu × 1 mol Cu₂S/2 mol Cu = 0.0485 mol Cu₂S
Step 3, Convert the theoretical yield to mass
The molar mass of Cu₂S is 159.16 g/mol.
0.0485 mol × 159.16 g/mol = 7.72 g
Step 4: Calculate the percent yield
We will use the following expression.
%yield = experimental yield/theoretical yield × 100%
%yield = 5.59 g/7.72 g × 100% = 72.4%
Answer:
Moles of Hydrogen produced is 5 moles
Explanation:
The balanced Chemical equation for reaction between zinc and sulfuric acid is :
This equation tells that ; when 1 mole of Zn react with 1 mole of sulfuric acid, it produces 1 mole of zinc sulfate and 1 mole of hydrogen.
Since sulfuric acid is in excess so Zinc is the limiting reagent
(Limiting reagent : Substance which get consumed when the reaction completes, limiting reagent helps in predicting the amount of products formed)
Limiting reagent (Zn) will decide the amount of Hydrogen produced
So,
Hence moles of Hydrogen produced is 5 moles
Answer:
Explanation:
The atoms w a positive (+) charge are protons
The atoms with a negative (-) charge are neutrons
The atoms in the outer shells are electrons.
I'm not sure if you just needed to label them or if there's something more but lemme know if so.
The correct answer is 0.9803 atm
Given, pressure of nitrogen = 745 mmHg
Conversion factor: 760 mmHg = 1 atm
Converting 745 mmHg to 1 atm
745 mmHg x ( 1 atm / 760 mmHg) = 0.9803 atm
So is the pressure of nitrogen is 0.9803 atm
16 and 6
Explanation:
the top number will be 16 and the bottom number will be 6