Magnesium chloride is an example of an ionic compound which is a compound composed of ?
Magnesium chloride is a compound which is composed of positive and negative ions. I hope this helps you :)
Guy that said it was DNA was right i just took the test to so another words your answer is Letter A DNA have a nice weekend! <span />
Answer: a.KOH
Potassium hydroxide is an ionic compound where the K+ is the cation and OH−is the anion. At the same time, the compound also contains a covalent bond since the anion, OH−is formed from electron sharing between the O and H atoms.
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Explanation:
Answer:
The complete equation (a) is:
, and is an exothermica phase change
The complete equation (b) is:
, and is an endothermic phase change.
Explanation:
<em>Equation (a):</em>
, is showing a phase change from a more-energetic state (liquid) to a relative-less-energetic state (solid), that means, that in order to have the phase change, it is requiered to remove heat (energy) from the water, this is known an exothermic (releases heat).
<em>Equation (b).</em>
, shows that to change from a relative-less-energetic phase (liquid) to a more-energetic one (gas), it would be needed to supply energy in order to acomplish this. And it is called endothermic (absorves heat)
Molar mass NaOH ( sodium hydroxide) = 40.0 g/mol
Number of moles:
n = mass / molar mass
n = 10.0 / 40.0
n = 0.25 moles
Volume = 2.0 L
Molarity = number of moles / volume in liters
M = 0.25 / 2.0
M = 0.125 M
answer D
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