Answer:
a) Warmer
b) Exothermic
c) -10.71 kJ
Explanation:
The reaction:
KOH(s) → KOH(aq) + 43 kJ/mol
It is an exothermic reaction since the reaction liberates 43 kJ per mol of KOH dissolved.
Hence, the dissolution of potassium hydroxide pellets to water provokes that the beaker gets warmer for being an exothermic reaction.
The enthalpy change for the dissolution of 14 g of KOH is:
<u>Where:</u>
m: is the mass of KOH = 14 g
M: is the molar mass = 56.1056 g/mol
The enthalpy change is:
The minus sign of 43 is because the reaction is exothermic.
I hope it helps you!
1)Na and O - ion bond
2)K and F - ion bond
3)Ne and O - no bond (as Ne is a noble gas)
And by elimination, your answer is 4)
Well, go through the steps. Condensation means? Read the paragraph and find out
It is the physical state of matter from gas phase into liquid phase, and is the reverse of evaporation. Condensation is the process by which water vapor in the air is changed into liquid water. Condensation is crucial to the water cycle because it is responsible for the formation of clouds
External fertilization in animals usually occurs in water or in damp areas in a process called spawning.
Answer:
Attraction, and repulsion!
Explanation:
Magnets have a north pole ans south pole, so when you put south pole and south pole toghther it creates repulsion, and when you put the north pole and north pole it still creats repulsion, but when a south pole and a north pole are put together it creats attraction, your welcome!
