0.5 A means 0.5 Coulomb of charge every second.
4 minutes = 240 seconds
(0.5 C/sec) x (240 sec)= 120 Coulombs
Explanation:
18. __Double displacement__ 2LiBr + Pb(NO₃)₂ → PbBr₂ + 2LiNO₃
In a double displacement reaction, there is an actual exchange of partners to form new compounds.
The driving condition for this kind of reaction are:
- formation of an insoluble compound called precipitate
- formation of water or any other non-ionizing compound
- liberation of a gaseous product.
Learn more:
Precipitation reaction brainly.com/question/1870098
19. ___Single displacement___ Fe + 2HCl → FeCl₂ + H₂
In a single displacement reaction, one substance replaces another.
- The replacement of a metallic ion in solution by a metal higher in the activity series than the metal in solution falls into this category.
- The positions of the two elements in the activity series serves as the driving force.
Learn more:
Chemical reactions brainly.com/question/3953793
20. ___Synthesis___ CaO + H₂O → Ca(OH)₂
Synthesis is a combination reaction
- This reaction involves the formation of a single product from two or more reactants.
- A compound forms from the union of two or more reactants
- The large and negative heat of formation of the product is the driving force for this reaction.
Learn more:
Synthesis brainly.com/question/2761166
21. ______Decomposition__ NiCl₂ → Ni + Cl₂
In a decomposition or cracking reaction, two or more product forms from a single reactant.
The breakdown of a compound into its component individual elements or other compounds fall into this category.
- The driving force for this reaction is the high heat of formation of the compound and the extreme instability of the compound.
- A stable compound can also be decomposed on heating and applying pressure.
Learn more:
Thermal decomposition brainly.com/question/11181911
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Compared to the wavelength of the incident light, diffuse reflection occurs when the size of surface irregularities is comparable to the size of the wavelength of the light.
The distance between the two crests or troughs of the light wave is known as the wavelength of light. Using the Greek letter lambda 'λ', it is identified. As a result, wavelength refers to the separation between one wave's crest or dip and the following wave.
In contrast to specular reflection, diffuse reflection involves the reflection of light, other waves, or particles off a surface so that rays incident on the surface are scattered at a variety of angles.
Refer to more about wavelength here
brainly.com/question/13533093
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Answer:
10 degree C
Explanation:
Q = 500 kcal = 500 x 1000 x 4.186 J = 2.1 x 10^6 J
V = 50 liter
m = Volume x density = 50 x 10^3 x 1000 = 50 kg
Let ΔT be the rise in temperature.
Specific heat of water = 4186 J/kg C
Q = m x c x ΔT
2.1 x 10^6 = 50 x 4186 x ΔT
ΔT = 10 degree C
