In the calorimeter, water is the exothermic. The salt LiCI, which will dissolve, is the endothermic. The final temperature of the water after the dissolution of LiCI was lower than the initial temperature, meaning the process is exothermic. In the microscopic view of the disspolution of LiCI, water molecules were seen to move slowly as they gained energy.

Explanation:

Exothermic is a process in which heat is released during the process. Endothermic reactions absorbs heat from surrounding during a chemical process. The dissolution of salt into water is an exothermic reaction. During this process heat is release and water molecules are broken down which are surrounded by salt ions.

5 0

1 year ago

How would you know if this combination is likely to be found in some dirt?

Mkey [24]

Answer:

very unlikely to be found in dirt

Explanation:

That combination has a ratio of ¹⁴N to ¹⁵N of 10:4 = 2.5: 1. The most ¹⁵N enriched natural material has a ratio of ¹⁴N to ¹⁵N on the order of 250 : 1 or higher. The combination shown is very unlikely to be found in dirt.

6 0

1 year ago

Two balloons are charged with an identical quantity and type of charge: 0.004 C. They are held apart at a separation distance of

lukranit [14]

Answer:

The answer to your question is F = 28800 N

Explanation:

Data

q₁ = q₂ = 0.004 C

distance = r = 5 m

k = 9x 10⁹ C

Force = F

Formula

F = k q₁ q₂ / r²

-Substitution

F = (9 x 10⁹)(0.004)(0.004) / (5)²

-Simplification

F = 144000 / 25

-Result

F = 28800 N

-Conclusion

The force of repulsion between these balloons is 28800 N

6 0

1 year ago