Answer:
magnesium. stronsium. barium. they are have similar group in IIA
Answer: <span>Ethanoic acid (CH3COOH)
Reason:
Chemical property of substance depends upon the functional group associated with the system. Compound with same functional group will have similar chemical properties.
In present case, </span>propanoic acid has an acidic functional group (-COOH). Also, ethanoic acid has an acidic functional group (-COOH).
On the other hand, propanal and1-propanol have aldehydic (-CHO) and alcoholic (-OH) functional group. <span>Propane is a pure alkane and will have minimum chemical reactivity.
Due to this, propanoic acid will have chemical properties similar to ethanoic acid. </span>
Answer:
⇒ n = 2.4088 × 10²⁴
- So, the no of atoms in 4 moles of helium is 2.4088 × 10²⁴.
Explanation:
<h3>
Answer:</h3>
The mole fraction of carbon dioxide is 0.0559
<h3>
Explanation:</h3>
- Mole fraction of a gas in a mixture of gases its given by dividing the number of moles of the gas by the total number of moles of the mixture.
In this case, we are given a mixture of N₂, CO₂ and He
To find the mole fraction of CO₂, first we need to calculate the total number of moles in the mixture.
Individual number of moles for each gas are;
Moles = mass ÷ Molar mass
Therefore;
Nitrogen gas (N₂)
Mass =18.0 g
Molar mass = 28.02 g/mol
= 0.642 moles N₂
Helium gas (He)
Mass = 50.5 g
Molar mass = 4.0 g/mol
= 12.625 moles He
Carbon dioxide (CO₂)
Mass = 34.6 g
Molar mass = 44.01 g/mol
= 0.786 moles CO₂
Therefore;
The total number of moles in the mixture;
= 0.642 moles + 12.625 moles + 0.786 moles
= 14.053 moles
Thus;
The mole fraction of CO₂= Moles of CO₂ ÷ Total number of moles
= 0.786 moles ÷ 14.053 moles
= 0.0559
Hence the mole fraction of carbon dioxide is 0.0559