Answer:
The correct answer is option D.
Explanation:
Step 1:
Step 2:
Overall reaction can be determined by adding all the reactions of mechanism:
Reactants in an overall reaction =
Products in an overall reaction =
According to question , the role of oxygen gas is product.
Answer : The new density and new volume of carbon dioxide gas is 0.2281 g/L and respectively.
Explanation :
First we have to calculate the new or final volume of carbon dioxide gas.
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
where,
= initial pressure of gas = 10 kPa
= final pressure of gas = 15 kPa
= initial volume of gas =
= final volume of gas = ?
= initial temperature of gas =
= final temperature of gas =
Now put all the given values in the above equation, we get:
The new volume of carbon dioxide gas is
Now we have to calculate the new density of carbon dioxide gas.
Formula for new density will be:
where,
= new pressure of gas = 15 kPa
= new temperature of gas =
M = molar mass of carbon dioxide gas = 44 g/mole
R = gas constant = 8.314 L.kPa/mol.K
= new density
Now put all the given values in the above equation, we get:
The new density of carbon dioxide gas is 0.2281 g/L
Answer:
Substance is Aluminium
Explanation:
We are given;
Mass; m = 13.5 grams
Volume; V = 5 cm³
Formula for density is;
density = m/V
Density = 13.5/5
Density = 2.7 g/cm³
From the table attached, we can see that the element with a corresponding density of 2.7 is Aluminium
