Answer:
No. The student is wrong.
Explanation:
Concentration of solution = mole/volume
mole of 5 g of copper = 5/63.546 = 0.0787 mole
Concentration of A = 0.0787/0.05 = 1.57 M
mole of 10 g of copper = 10/63.546 = 0.1574 mole
Concentration of B = 0.1574/0.1 = 1.57 M
The two solution are added together:
Total concentration = total number of mole/total volume
= 0.0787 + 0.1574/0.05 + 0.1
= 0.2361/0.15
= 1.57 M
Hence, the new solution has the same concentration with solution A and solution B.
The student's conclusion was wrong.
To determine the amount of excess reactant left, we need to first identify which is the limiting and the excess reactant. We do as follows:
<span>A + 2B → AB2
2 mol A ( 2 mol B / 1 mol A) = 4 mol B needed to be consumed completely
5 mol B ( 1 mol A / 2 mol B) = 2.5 mol A needed to be consumed completely
Therefore, the limiting would be reactant A and the excess would be reactant B. The amount of the excess would be:
5 mol B - 4 mol B = 1 mol B <----------LAST OPTION</span>
Answer:
Earth is in the solar system.
Explanation:
Earth is our home and it is in the solar system.
Earth is the fifth-largest of the planets in the solar system and the third planet from the sun. Earth is the only planet having oxygen and water that supports life. Till now according to the research Earth is the only planet having life.
Planets are in the solar system, the solar system is in the milky way and the milky way is present in the universe. T<u>he astronomer identifies our home in the universe as "Earth is in the solar system" as Earth is our home.</u>
Hence, the correct answer is "Earth is in the solar system."
Answer:
A) Jellyfish
Explanation:
has a sessile larval stage as a polyp, leading to a motile stage as they reach maturity. Conversely, organisms such as barnacles have a motile, pelagic larval stage and become sessile in their adult life