Answer: Incomplete/half answer
Explanation:
grams of molar mass of the
substance substance in grams
––––––––––– = –––––––––––––––
moles of the
substance one mol
use this formula to asnwer the question
Answer:
<em>293.99 g </em>
OR
<em>0.293 Kg</em>
Explanation:
Given data:
Lattice energy of Potassium nitrate (KNO3) = -163.8 kcal/mol
Heat of hydration of KNO3 = -155.5 kcal/mol
Heat to absorb by KNO3 = 101kJ
To find:
Mass of KNO3 to dissolve in water = ?
Solution:
Heat of solution = Hydration energy - Lattice energy
= -155.5 -(-163.8)
= 8.3 kcal/mol
We already know,
1 kcal/mol = 4.184 kJ/mole
Therefore,
= 4.184 kJ/mol x 8.3 kcal/mol
= 34.73 kJ/mol
Now, 34.73 kJ of heat is absorbed when 1 mole of KNO3 is dissolved in water.
For 101 kJ of heat would be
= 101/34.73
= 2.908 moles of KNO3
Molar mass of KNO3 = 101.1 g/mole
Mass of KNO3 = Molar mass x moles
= 101.1 g/mole x 2.908
= 293.99 g
= 0.293 kg
<em><u>293.99 g potassium nitrate has to dissolve in water to absorb 101 kJ of heat. </u></em>
Answer: When two light bulbs are connected in parallel, which is true? A. The total resistance is less than the resistance of either bulb alone. B. The Voltage provided
Explanation:
Rivers, oceans, lakes, ponds
The satellite's rockets fire in 18.54 s
<h3>Further explanation</h3>
Given
F- Force = 550 N
I - impulse = 10,200 kg m/s
Required
Fire time
Solution
Impulse is defined is the product of the force with the time interval when the force is acting on the object.
Can be formulated :
I = F. Δt
Δt = I : F
Input the value :
