Solid - Retains its shape no matter the container
Gas - Particles move freely but dont go far
Liquid - Expands to fit the volume of container
Plasma - I guess the oter thing
(THEESE ARE JUST EDUCATED GUESSES)
133.92g
Explanation:
Given parameters:
Equation of the reaction 2PbS + 30₂ → 2PbO + 2SO₂
Number of moles of 0₂ = 0.6moles
Unknown:
Mass of PbO produced = ?
Solution:
The number of moles is the quantity used in chemistry to express the amount of particles contained in a substance.
2PbS + 30₂ → 2PbO + 2SO₂
From the reaction;
3 moles of O₂ will produce 2 moles of PbO
0.6 moles of O₂ will then produce = 0.4moles
Now since the we know the number of moles of PbO;
Mass of PbO = number of moles of PbO x molar mass
molar mass of PbO = 207.2 + 16 = 223.2g/mol
Mass of PbO = 0.6 x 223.2 = 133.92g
learn more:
Number of moles brainly.com/question/1841136
Ideal gas brainly.com/question/13064292
#learnwithBrainly
Answer:
C. 3.74 g/L
Explanation:
Using ideal gas equation as:
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value = 0.0821 L.atm/K.mol
Also,
Moles = mass (m) / Molar mass (M)
Density (d) = Mass (m) / Volume (V)
So, the ideal gas equation can be written as:
At STP,
Pressure = 1 atm
Temperature = 273.15 K
Molar mass of krypton gas = 83.8 g/mol
Applying the equation as:
1 atm × 83.8 g/mol = d × 0.0821 L.atm/K.mol × 273.15 K
⇒d = 3.74 g/L
Answer: mechanical energy
Explanation: