Question

What is the mass of 2.50L of SO2 gas at stp

Answer 1

Answer: 4.84 grams

Step-by-step explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass, occupies 22.4 L of volume at STP and contains avogadro's number
`6.023* 10^(23)` of particles.

To calculate the number of moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given volume}}{\text{Molar volume}}=(2.50)/(22.4)=0.11`

1 mole of
`SO_2` weighs = 44 g

0.11 moles of
`SO_2` weigh =
`\frac{44}1}* 0.11=4.84g`

Thus mass of 2.5 L of
`SO_2` weigh 4.84 grams.

Answer 2

STP is abbreviation for Standard Temperature and Pressure at which the temperature is 273 K and pressure is 1 atm
- At these conditions the molar volume is equal to 22.4 L
so 1 mole of SO₂ volume = 22.4 L
? mole of SO₂ volume = 2.5 L
number of moles = 2.5 / 22.4 = 0.1116 mol
mass of SO₂ = 0.1116 * 64.063 = 7.15 g