Enthalpy change during the dissolution process = m c ΔT,
here, m = total mass = 475 + 125 = 600 g
c = <span>specific heat of water = 4.18 J/g °C
</span>ΔT = 7.8 - 24 = -16.2 oc (negative sign indicates that temp. has decreases)
<span>
Therefore, </span>Enthalpy change during the dissolution = 600 x 4.18 X (-16.2)
= -40630 kJ
(Negative sign indicates that process is endothermic in nature i.e. heat is taken by the system)
Thus, <span>enthalpy of dissolving of the ammonium nitrate is -40630 J/g</span>
Answer:
There are 6.022 * 10(23 as a power) water molecules.
Explanation:
3.50 * 6.022 * 10(23 as a power) . mol(-1 as power)
=~ 21* 10(23 as power) .
Hope it helps!
A graduated cylinder. They are the most common method of getting a required volume of water. (other ways are using volume-metric pipets, graduated pipets, burets, syringes, and volume-metric flask. However these tools are a lot less common)
Answer:
Most likely Potential Energy
Explanation:
This is possible because potential energy is stored energy that an object contains until moved, once moved it transfers its potential energy into kinetic energy. In this problem, the kinetic energy in the torch is changed into potential energy once placed on the shelf and deprived of movement. Thus your only viable answer is Potential energy!
Hope this helps, please comment in case wrong so I may figure it out and correct my mistakes
Answer: Ionic Compound
Explanation:
An ionic compound is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and the element which accepts the electrons is known as electronegative element or non metal.
A covalent compound is formed when an element shares its valence electron with another element. This bond is formed between two non metals.
Mercury flouride contain ionic bonds as it is made up of mercury metal and fllourine non metal.
