Answer:
Explanation:
From the statement of the problem,
B₂S₃
+ H₂O
→ H₃BO₃
+ H₂S
B₂S₃ + H₂O → H₃BO₃ + H₂S
We that the above expression does not conform with the law of conservation of mass:
To obey the law, we need to derive a balanced reaction equation:
Let us use the mathematical method to obtain a balanced equation.
let the balanced equation be:
aB₂S₃ + bH₂O → cH₃BO₃ + dH₂S
where a, b, c and d will make the equation balanced.
Conservating B: 2a = c
S: 3a = d
H: 2b = 3c + 2d
O: b = 3c
if a = 1,
c = 2,
b = 6,
2d = 2(6) - 3(2) = 6, d = 3
Now we can input this into our equation:
B₂S₃ + 6H₂O → 2H₃BO₃ + 3H₂S
B₂S₃ + 6H₂O → 2H₃BO₃ + 3H₂S
Bronze alloy and porcelain dentures
Octane is the resistance of the burning of gasoline
Answer:
Heat energy (Q) = 334.72
Explanation:
Volume = 4mL
Initial temperature (T1) = 10°C
Final temperature (T2) = 30°C
Mass = ?
Specific heat capacity of water = 4.184J/g°C
Density of water = 1.0g/mL
Heat energy = ?
Density = mass / volume
ρ = mass / vol
Mass = volume × density (ρ)
Mass = 4 × 1.0
Mass = 4g
Heat energy (Q) = mc∇T
Q = heat energy
M = mass of the substance
C = specific heat capacity of the substance
∇T = change in temperature of the substance = T2 - T1
Q = mc(T2 - T1)
Q = 4 × 4.184 ×(30 - 10)
Q = 16.736 × 20
Q = 334.72J
The heat energy required to raise 4ml of water from 10°C to 30°C is 334.72J
