2Al2O3 ---> 4Al + 3O2 How many moles of oxygen are produced when 26.5 mol of aluminum oxide are decomposed?

There are two types of conductance

a) molar conductance

b) specific conductance

specific conductance is also known as conductivity

Molar conductance [the conductance offered by one mole of electrolyte dissolved in any volume of solution] increases with increase in dilution. The reason for weak and strong electrolytes are different.

i) for weak electrolytes the molar conductance increases due to increase in degree of dissociation

ii) for strong electrolytes the molar conductance increases due to decrease in inter ionic interactions

Conductivity (specific conductance) is the conductance offered by one unit volume of an electrolytic solution

The conductivity decreases with increase in dilution due to less number of ions per unit volume of solution.

so here the conductivity of resulting solution will decrease if water is added to a 0.10 M NaCl  solution

Answer:

Benzene is denser than ethanol.

Explanation:

Given data:

Volume of ethanol = 7.5 mL

Mass of ethanol = 5.85 g

Volume of benzene = 7.5 mL

Mass of benzene = 6.60 g

Which is denser = ?

Solution:

First of all we will calculate the density of both substances.

Density of ethanol:

d = m/v

d = 5.85 g/ 7.5 mL

d = 0.78 g/mL

Density of benzene:

d = m/v

d = 6.60 g/ 7.5 mL

d = 0.88 g/mL

The density of benzene is higher thus it is denser than ethanol.

Answer:

Benzene

Explanation:

You need to calculate the densities for each compound.

EtOH = 5.85/7.5 = 0.78 g/mL

Benzene = 6.60/7.5 = 0.88 g/mL

0.88 > 0.78, thus benzene is denser than ethanol.

Answer:

It’s A

Explanation: