The Answers is D because cell division purpose is grow and repair
Answer:
Option c = Lighting of matchstick
Explanation:
The lightning of match stick is combustion reaction. The chemical potassium chlorate, glue, sulfur and starch is present on the tip of match stick. When the match stick catch the fire combustion process occur and heat is released.
Photosynthesis in plant:
It is the reaction in which plants used the carbon dioxide and water and convert it into sugar and oxygen in the presence of light.
6CO₂ + 6H₂O + light → C₆H₁₂O₆ + 6O₂
Mixing of acid and base:
When an acid react with base it form the salt and water. The reaction is also called neutralization reaction because both neutralize each other.
In neutralization reaction equal amount of acid and base react to neutralize each other and equal amount of water and salt are formed. When pH does not reach to 7 its means there is less amount of one of reactant which is not fully neutralize.
Reacting of sodium and chlorine
The reaction of sodium and chlorine is the formation of ionic compound. It is formed by the complete transfer of electron from sodium to chlorine atom and form ionic bond. In this ionic compound sodium carry positive charge and chlorine carry negative charge there is attraction between these oppositely charged atoms.
Answer:
189.75g
Explanation:
mass is equal to mole*molar mass and the molar Mass of KNO3 is 55 so 3.45*55 is equal to 189.75
Reactants on the left and products on the right
1670 km/h; 40 200 km/day
<em>a) Velocity in kilometers per hour</em>
The conversion factors are 1 km/1000 m, 60 s/1 min, and 60 min/1 h.
We can string these together to get
Velocity = (465 m/1 s) x (1 km/1000 m) x (60s/1min) x (60 min/1 h)
= 1674 km/h
= 1670 km/h (three significant figures)
<em>b) Velocity in kilometers per day
</em>
The conversion factor is 24 h/1 day.
Velocity = (1674 km/1 h) x (24 h/1 day) = 40 200 km/day