Answer:
I can't answer that Po sorry
Answer:
B: A big chunk of space rock
Explanation:
asteroids are basically known as minor planets.
whereas shooting star is some dust burning while entering earths atmosphere.
on the other hand comet is some icy material consisting of gases.
and meteor is a very very small rocky or metallic body.
Answer:
Iron, copper , calcium
Explanation:
Iron , copper and calcium are present in three different groups.
Iron is present in group eight.
Copper is present in group eleven.
Calcium is present in group two.
Sodium , potassium and rubidium are present in same group i.e. group one. These are alkali metals.
Fluorine, chlorine and bromine are present in group seventeen. These are halogens.
Argon, Krypton and xenon are present in same group i.e, group eighteen. All are these noble gases.
<u>Answer:</u> The volume of HBr solution required is 130.16 mL
<u>Explanation:</u>
To calculate the concentration of base, we use the equation given by neutralization reaction:
where,
are the n-factor, molarity and volume of acid which is 
are the n-factor, molarity and volume of base which is 
We are given:
Putting values in above equation, we get:
Hence, the volume of KOH solution required is 130.16 mL
