Not 100% sure, but I think it’s Water, hope this helps
Answer:
6m 48cm
Explanation:
First we can convert the length of Mac's bedroom to centimeters:
As<em> 1 m is equal to 100 cm</em>,
- 3m 59cm is equal to 300 cm + 59 cm = 359 cm.
As for Dennis' bedroom's information:
Now we can calculate the length of Dennis' bedroom:
Rewriting the answer leaves us with 6m 48cm.
Answer:
5.86
Explanation:
The equation of reaction is between methylamine and hydrochloric acid
CH₃NH₂ + HCl -------> CH₃NH⁺₃ + Cl⁻
At equivalence point, there is a mixture of equal volume of acid and base. As such, the concentration of CH₃NH⁺₃ will be half the initial starting concentration of the reactant.
i.e [CH₃NH⁺₃] =
= 0.095 M
Now, the dissociation of CH₃NH⁺₃ yields
CH₃NH⁺₃ ⇄ CH₃NH₂ + H⁺
The ICE Table can be constructed as follows:
CH₃NH⁺₃ ⇄ CH₃NH₂ + H⁺
Initial 0.095 0 0
Change -x x x
Equilibrium (0.095 - x) x x
------ equation (1)
We all know that:
and we are given = ; and ;
Then;
We can now re-write the equation (1) to be :
where a = 1; b = 2×10⁻¹¹; c = 1.9×10⁻¹²
Using the quadratic formula; ; we have
= OR
x =
[CH₃NH₂] = [H⁺] =
∴ pH = -log [H⁺]
pH = -log
pH = 5.86
Hence, the pH at the equivalence point for the titration = 5.86
Answer:
a) 4869 kj will be released
b) 43.86 g of octane
Explanation:
The heat of combustion is the amount of heat released when one mole of a substance reacts with enough oxygen
since the heat of combustion is per mol of combustible substancewjat we are required to do in this problem is calculate number moles in the reactions although in a different manner
a) MW C3H6O = 158 g/ mol
mol C3H6O = 158 g × 1 mol/ 58.08 g
= 2.72 - 1790 kj / mol ×2.72 mol = 4869 kj
b) Here we are asked the mass of octane to produce 1950 kj of heat knowing that per mole of octane we get 5074.1 kj then
1 mol / 5074.1kj × 1950 kj= 0.384 mol
mass C8H18 = 0.384 mol × 114.23 g/ mol = 43.86 g
Answer:
iwan ko mahirap nag tunung