Answer:
The energy gained by the water will equal the energy lost by the surroundings.
Explanation:
Given the following:
Concentration of residual (NH4)+ = 0.12 - 0.03 = 0.09 mol / L
Concentration of created NH3 = 0.03 mol / L
The (NH4) + reacts with all (OH)- to form NH3 and H2O ( Water )
The resultant solution is NH4+ / NH3 buffer system in which (NH4)+ is acid and the NH3 is base or as called the salt.
For a buffer system :
pH = pKa + Log (acid) / (salt)
= 9.25 + Log [ (NH4)+ ] / [ NH3 ]
= 9.25 + Log [ 0.09 ] / [ 0.03 ]
= 9.25 + Log 3
= 9.25 + 0.4771
pH = 9.7271 or 9.73 which is rounded up to 2 decimal places
6CO₂(g) + 6H₂O(l) → C₆H₁₂O₆(s) + O₂(g)
<u>Explanation:</u>
In our real life we can have the example of chemical reaction that is photosynthesis. In the photosynthesis of plants, plants making their food by means of using water in the liquid state, carbon-di-oxide in the gaseous state obtained from the sun to produce glucose and water, in which glucose is in the solid state and oxygen is in the gaseous state. The balanced equation can be given as,
6 CO₂(g) + 6 H₂O(l) → C₆H₁₂O₆(s) + O₂(g)
Answer:
The density of this solution is 2.2 g/mL
Option 3 is correct
Explanation:
Step 1: Data given
Volume = 10.0 mL
mass = 22 grams
Step 2: Calculate the density
Density = Mass / volume
Density = 22.00 grams / 10.0 mL
Density = 2.2 grams / mL
The density of this solution is 2.2 g/mL
Option 3 is correct