Answer:
1.3 × 10⁻¹⁵
Explanation:
At a certain temperature, the pH of a neutral solution is 7.45. Then, we can calculate the concentration of H⁺.
pH = -log [H⁺]
[H⁺] = antilog -pH = antilog -7.45
[H⁺] = 3.55 × 10⁻⁸
By definition, in a neutral solution the concentration of H⁺ is equal to that of OH⁻.
Finally, we can calculate the ionic product of water (Kw).
Kw = [H⁺] × [OH⁻]
Kw = 3.55 × 10⁻⁸ × 3.55 × 10⁻⁸
Kw = 1.3 × 10⁻¹⁵
Answer:
The answers :some of the oxygen will evaporate into the air
Explanation:
Perfect
Answer:
<h2>volume = 3.63 mL</h2>
Explanation:
The density of a substance can be found by using the formula
<h3>
</h3>
Since we are finding the volume
Making volume the subject we have
<h3>
</h3>
From the question
mass = 63.6 g
Density = 17.5 g/mL
Substitute the values into the above formula and solve for the volume
That's
<h3>
</h3>
We have the final answer as
<h3>volume = 3.63 mL</h3>
Hope this helps you
Answer:
The answer is in image see it..
I suppose that the question ask the following:
What is the mass of a sample, composed of C₃H₅N₃O₉ molecule, that contains 100 g carbon?
First we calculate the molecular mass of our molecule C₃H₅N₃O₉.
molecular mass = 12 × 3 + 1 × 5 + 14 × 3 + 16 × 9 = 227 g/mol
Now we devise the following reasoning:
if 227 g of our molecule contains 27 g of carbon
then X g of our molecule contains 100 g carbon
X = (100 × 227) / 27 = 840.7 g