Single-displacement reaction occurs when aluminum reacts with copper nitrate.
Single-displacement reaction is the type of chemical reaction that occurs when aluminum (Al) reacts with copper nitrate (Cu(NO3)2). In this type of reaction, aluminum takes the place of copper and produced aluminium nitrate.
Aluminum does not react with potassium nitrate (KNO3) although it reacts with copper nitrate because potassium nitrate (KNO3) is a stable compound which held each other very tightly so we can conclude that Single-displacement reaction occurs when aluminum reacts with copper nitrate.
Learn more about chemical reaction here: brainly.com/question/11231920
Learn more: brainly.com/question/25945286
The correct option is C.
For all liquids, at boiling point the temperature remain constant while the volume of the liquid will decrease.
The temperature applied at boiling point is used to break the inter molecular forces that are holding the particles of the liquid together.
The volume of the liquid is decreasing because the particles are changing to gas and escaping to the atmosphere as gas.
<span>The oxidation number of oxygen in compounds is usually -2, but it is -1 in peroxides. The sum of the oxidation numbers of all the atoms in a neutral compound is 0. The oxidation number of H is +1 (Rule 1). If you know that H₂O₂ is hydrogen peroxide, you can immediately assign oxygen the ON = -1.</span>Jul 2, 2014
Answer:
The molar mass (Mm) of the compound is 127.39 g/mole
Explanation:
ΔT = Kf. molality
ΔT = change in temperature = Tfinal - Tinitial = 2.8 - 5.5
Kf = freezing point depression constant = - 4.3 C/m (always negative because temperature is decreasing)
molality = moles of solute/Kg of solvent = mole (n)/(20 x 10^-3 Kg of benzene)
(2.8 - 5.5) = (-4.3) x molality
molality = 0.6279 mole/kg
0.6279 = mole of compound/(20 x 10^-3)
mole of compound = 0.01256 mole
mole (n) = mass (m) divided by Molar mass (Mm)
Molar mass = mass of compound / mole of compound
m/n = 1.6/0.01256 = 127.39 g/mole