Answer:
205.3°C
Explanation:
Given parameters:
V₁ = 0.287L
V₂ = 0.18L
T₂ = 37°C
Unknown:
T₁ = ?
Solution:
Since we are interested in volume and temperature relationships in a fixed pressure of the balloon, Charles's law will be a perfect solution to this problem.
Charles's law states that "At constant pressure, the volume of a fixed mass of gas is directly proportional to its temperature".
Mathematically;
where V and T are volume and temperature of the gas
1 and 2 are initial and final states;
let us convert T₂ = 37°C to K; 37 + 273 = 300K
Input the parameters and solve for the unknown;

T₁ = 478.3K
Now convert back to °C; 478.3 - 273 = 205.3°C
The pH of water is 7
5.3 to 4.3 is more acidic. 1 pH is more acidic than 2 pH The base starts at 8.
18 g of hydrogen gas
Explanation:
We have the following chemical reaction:
2 Fe + 6 HCl → 2 FeCl₃ + 3 H₂
Knowing the stoichiometry of the chemical reaction, we devise the following reasoning:
if 2 moles of iron react produces 3 moles of hydrogen
then 6 moles of iron react produces X moles of hydrogen
X = (6 × 3) / 2 = 9 moles of hydrogen
mass = number of moles × molecular weight
mass of hydrogen (H₂) = 9 × 2 = 18 g
Learn more about:
number of moles
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