Stan is a member of the Association for Consumer Research, but when he attends the conferences, he doesn't identify with the gro
1 answer:
You might be interested in
Explanation:
Since, density is the amount of mass present in per unit volume.
Mathematically, Density =
As density is directly proportional to mass of a substance. So, more is the density of a substance more will be its mass. And, when more is the mass of a substance then it is likely to sink at the bottom.
Here, it is given that density of oxygen is more than the density of nitrogen. Therefore, balloons filled with oxygen will sink in the air.
On the other hand, balloons filled with nitrogen will rise in the air.
<u>Answer:</u> The pH of the solution is 12.61
<u>Explanation:</u>
To calculate the number of moles for given molarity, we use the equation:
......(1)
- <u>For hydrazoic acid:</u>
Molarity of hydrazoic acid solution = 1.200 M
Volume of solution = 242.5 mL
Putting values in equation 1, we get:
- <u>For NaOH:</u>
Molarity of NaOH solution = 0.3400 M
Volume of solution = 1006 mL
Putting values in equation 1, we get:
The chemical reaction for hydrazoic acid and NaOH follows the equation:
<u>Initial:</u> 0.291 0.342
<u>Final:</u> 0 0.051 0.291 0.291
Volume of solution = 242.5 + 1006 = 1248.5 mL = 1.2485 L (Conversion factor: 1 L = 1000 mL)
- <u>For NaOH left:</u>
Left moles of NaOH = 0.051 moles
Volume of the solution = 1.2485 L
Putting values in equation 1, we get:
1 mole of NaOH produces 1 mole of sodium ions and 1 mole of hydroxide ions
To calculate pOH of the solution, we use the equation:
We are given:
Putting values in above equation, we get:
To calculate pH of the solution, we use the equation:
Hence, the pH of the solution is 12.61