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3 years ago

Why is an electrolyte able to conduct electricity while a nonelectrolyte cannot?

1 answer:

7 0

Ionic compounds do not conduct electricity in the solid state because the ions are held in a lattice and do not move freely. However, when they are melted or dissolved in water, they can conduct electricity. This is because the ions are free to move in the molten state or aqueous solution.

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Carbon dioxide gas is collected at 27.0(degrees)C in an evacuated flask with a measured volume of 30.0L. When all the gas has be

White raven [17]

Answer:

Moles of carbon dioxide gas is 0.584 moles.

Mass of 0.584 moles of carbon dioxide gas is 25.7 g

Explanation:

Using ideal gas equation

PV = nRT

where,

P = Pressure of gas = $0.480 atm$

V = Volume of gas = 30.0 L

n = number of moles of gas = ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of gas = 27°C = 300.15 K

Putting values in above equation, we get:

$(0.480 atm)\times 30.0 L=n\times (0.0821L.atm/mol.K)\times 300.15K\\\\n=0.5844 mol\approx 0.584$

Moles of carbon dioxide gas = 0.584 moles

Mass of 0.584 moles of carbon dioxide gas = 0.584 mol × 44 g/mol = 25.69 g ≈ 25.7 g

5 0

3 years ago

The weight of 100g H2 and 100 g He is same yet the number of elements is not same.

sukhopar [10]

Answer:

The mole and atonmicity of both the gases are different, the number of atoms is not same.

Explanation:

The number of atoms in a molecule (compound) depends on mole number and atomicity.

↬ Mole of 100 g H₂ = 100g ÷ 2u = 50 mole

∴Number of atoms in 100 g H₂

= 2 x 50 x 6.022 × 10²³

= 6.022 x 10²⁴ atoms

↬ Mole of 100 g He = 100g ÷ 4u = 25 mole

∴ Number of atoms in 100 g He

= 1 × 25 × 6.022 × 10²³

= 150.55 × 10²³

= 1.5055 x 10²⁵ atoms

Thus, The mole and atonmicity of both the gases are different, the number of atoms is not same.

-TheUnknownScientist 72

6 0

2 years ago

A teacher reacts 84.0 g of sodium bicarbonate with excess hydrochloric acid. What is the percent yield for sodium chloride if 56

Bond [772]

Answer:

Explanation:

5 0

3 years ago

the subject is science Movement of water on or near the surface of the water is called a deep current true or false

Bogdan [553]

True is the answer. Hope this helps.

6 0

3 years ago

Read 2 more answers

I point

Mrrafil [7]

The ionization constant equation is:

$K_{w}$ =1.0 × $10^{-14}$ at 25°C

the option is 1.

Explanation:

Sometimes in pure water one proton of the water molecule(hydrogen ion) will get attracted to the lone pairs present in another water molecule.This causes the hydrogen ion to leave the present water(leaving the $OH^{-}$ behind) molecule ad gets attached to another water molecule leading to the formation of the hydronium ion( $H^{3} O{+}$ ,hydronium ion).

This process is called auto-ionization of water because the water molecule ionizes into $H^{+}$ and $OH^{-}$ ions.

As such the equilibrium constant,which is measure of concentration of products to concentration of reactants,will be very slow.

∴the ionization constant of water at 25°C is 1.0 × $10^{-14}$ .

(i.e.)option c is correct answer [ $H^{+}$ ]=[ $OH^{-}$ ]

4 0

4 years ago