Answer:
940 J
Explanation:
This is a calorimtetry excersie where you apply the formula
Q = C . m . ΔT
We only have 2 data from here, C and ΔT (from the solution)
C → 3.97 J/g°C
ΔT → 2.3°C
We determine the solution's mass by density:
1.03 g/mL = Solution mass / Solution volume
We assume the HCl as the solution volume → 100 mL
1.03 g/mL . 100 mL = 103 g → solution's mass
We replace data: Q = 103 g . 3.97 J/g°C . 2.3°C → 940.4 J
Answer:
The mass percent of alcohol in a solution is 19.8 %
Explanation:
First of all we calculate the mass of each compound from the solution.
Solute → Ethyl alcohol
Solvent → Water
To determine the mass, we use density
Density = mass / volume → Mass = Density . volume
Mass of solute: 0.8 g/mL . 62 mL = 49.6 g
Mass of solvent: 1 g/mL . 200 mL = 200 g
Mass of solution = Solvent's mass + Solute 's mass
200 g + 49.6 g = 249.6 g
Mass percent of alcohol → (mass of alcohol / Total mass) . 100
(49.6 g / 249.6 g) . 100 = 19.8 %
Answer:
Slow combustion
Spontaneous combustion
Explosive combustion
Explanation:
-Slow combustion reactions: Occurs at low temperatures. Cellular respiration is an example.
-Spontaneous combustion reactions: Occurs suddenly without an outside heat source. The heat source is the result of oxidation.
-Explosive combustion reactions: Involves an oxidizing agent.
hopefully this helped :3
Answer:
im not sure
Explanation:
i went on here looking nobody answered yet