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2 years ago

What is the molarity of a solution containing 5.0 moles of kcl in 2.0 l of solution?

2 answers:

5 0

Molarity is defined as number of moles of solute dissolved per litre of solution. M is the symbol used for it. unit is= mol/ Litre Given: Moles of solute KCl is 5 volume of solution is 2L Calculation: Molarity= Moles of Solute/ volume M= 5/2= 2.5 mol/L

natima [27]2 years ago

4 0

Solution:

Molarity describes the concentration of a substance as measured by the number of moles divided by the volume of the solution it's in.

Now,

We have given that

5.0 moles of kcl

2.0 liters of solution

We have to find the concentration;

Concentration = Moles of solute divided by Volume of solution

= 5.0mole/2.0L

=2.mol/L

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A piece of unknown metal weighs 348g. When the metal piece absorbs 6.64kj of heat , its temperature increases from 24.4C to 43.6

Morgarella [4.7K]

Answer:

This metal could be the aluminium with a specific heat of $H = 993 \frac{J}{kgC}$

Explanation:

A pie of unknown metal presents a mass (M) of 348 g. This metal is heated using energy (E) of 6.64 kJ and the temperature increases from T1 =24.4 to T2 =43.6°C. We can calculate the specific heat (H) of this metal as follows

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