Answer:
Explanation:
1. Mass of zinc
The density of zinc is 7.14 g/cm³
D = m/V
2. Volume of aluminium
The density of aluminium is 2.60/cm³.
B.
its the only one with ozone in the reaction O₃
Answer: f. 2:2:2:1
Explanation: The reaction is a single displacement where Cs displaces H to pair up with OH.
The balance chemical equation is:
2 Cs + 2 H2O => 2 CsOH + H2
The number of atoms on both sides are equal.
Cs= 2
H= 4
O= 2
Density = mass/volume = 316/22.5 = 14.045g/mL.
Answer : The molar mass of unknown compound is 152.38 g/mole
Explanation :
Depression in freezing point =
Mass of unknown compound = 16.5 g
Mass of water = 106.0 g
Formula used :
where,
= depression in freezing point
i = Van't Hoff factor = 1 (for non-electrolyte)
= freezing point constant for water =
m = molality
Now put all the given values in this formula, we get
Therefore, the molar mass of unknown compound is 152.38 g/mole