Answer:
Susie cooked sausages on a barbecue. (a) Fat and water in the sausages changed state. Draw one line from each statement to the correct change of state.
Explanation:
brailest/ crown please
Answer:
2000J
Explanation:
Given parameters:
Heat of fusion = 80J/g
Mass of substance = 25g
Unknown:
Amount of energy required to melt the given mass = ?
Solution:
To solve this problem, the amount of energy required to melt the substance is given as;
H = m L
m is the mass
L is the heat of fusion
Insert the given parameters and solve;
H = 25 x 80 = 2000J
Answer:
V₂ = 145.35 L
Explanation:
Given data:
Initial volume = 400 L
Initial pressure = 300 mmHg (300/760 =0.39 atm)
Initial temperature = 20 °C (20 +273 = 293 K)
Final temperature = 273 K
Final volume = ?
Final pressure = 1 atm
Solution:
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
P₁V₁/T₁ = P₂V₂/T₂
V₂ = P₁V₁T₂ /T₁ P₂
V₂ = 0.39 atm × 400 L × 273 K / 293 K × 1 atm
V₂ = 42588 atm.L.K /293 K.atm
V₂ = 145.35 L
The mass of CO₂ gas = 4.312 g
<h3>Further explanation</h3>
Reaction
NaHCO₃ (s) + HCl (aq) → NaCl (aq) + H₂O (aq) + CO₂ (g)
Find limiting reactant
mol NaHCO₃
![\tt \dfrac{8.24}{84,007 }=0.098](https://tex.z-dn.net/?f=%5Ctt%20%5Cdfrac%7B8.24%7D%7B84%2C007%20%7D%3D0.098)
mol HCl
![\tt \dfrac{4.41}{36.5}=0.121](https://tex.z-dn.net/?f=%5Ctt%20%5Cdfrac%7B4.41%7D%7B36.5%7D%3D0.121)
Limiting reactant : NaHCO₃ (smaller)
mol CO₂ = mol NaHCO₃ = 0.098
mass CO₂ :
![\tt 0.098\times 44=4.312~g](https://tex.z-dn.net/?f=%5Ctt%200.098%5Ctimes%2044%3D4.312~g)
I’m pretty sure the correct answer is D.