The answer to this question is: B) 3+
<span>Multiply the coefficient in front of the formula times the subscript for each element. This gives 36 carbon atoms, 72 hydrogen atoms, and 36 oxygen atoms.</span>
Answer: The student should pour out 92.068 cm³ of diethylamine.
Explanation:
The equation for density is: 
We are given the density and mass of a liquid and asked to calculate the
volume of the liquid. We rearrange the equation to give
v= 65.0 g÷0.706 g.cm³ = 92.068 cm³
The grams cancel, thus the unit left is cm³.
Since pKa = -log10(Ka), for every pKa value of 1 an acid is below another, the acid is 10 times stronger. Therefore acid A is 10^4 = 10000 times stronger than B.
<h3>
Answer:</h3>
59.87 kJ
<h3>
Explanation:</h3>
In the question , we are given;
- Molar heat of Vaporization as 10.79 kJ/mol
- Mass of water at 100°C is 100 g
We are required to calculate the amount of heat energy absorbed to convert water at 100°C to steam at 100°C.
- The process of converting water from liquid state to solid state without change in temperature is known as condensation.
- We are given the molar heat of vaporization as 10.79 kJ/mol, this means 1 mole of water will absorb 10.79 kJ when converted to ice without change in temperature.
- Therefore, we can first calculate the number of moles of water;
Moles = Mass ÷ Molar mass
Molar mass of water = 18.02 g/mol
Moles of water = 100 g ÷ 18.02 g/mol
= 5.549 moles
But;
Q = n × ΔHv , where n is the number of moles and ΔHv molar heat of Vaporization.
Therefore;
Q = 5.549 moles × 10.79 kJ/mol
= 59.874 kJ
= 59.87 kJ
Thus, the amount of heat absorbed is 59.87 kJ
