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3 years ago

Which of the following changes would decrease the rate at which a solid solute dissolves in a liquid solvent?

Chemistry

2 answers:

Fed [463]3 years ago

4 0

Answer:

The correct answer would be B. Decreasing surface area.

Explanation:

It would be decreasing because the surface area is dissolving, so the surface area is decreasing.

andriy [413]3 years ago

3 0

Answer:

Decreasing surface area of the solid in the liquid.

Explanation:

I don't know how to explain this without using. an example. So, here it is: If you were dipping bread in water, the bread would be completely soaked if you dipped the whole thing, but if you only allowed one part of the bread to be in the water, it would take longer for the water to soak all the way into it. The amount of surface area that is allowed to touch what is making the solid dissolve determines how quickly the whole thing will be dissolved.

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An unknown metal sample has a mass : of 11.29. and a volume of 2 cm3. What is the : density of the unknown metal?

tatuchka [14]

Answer:

$\boxed{\sf Density \ of \ the \ unknown \ metal = 5.645 \ g/cm^3}$

Given:

Mass = 11.29 g

Volume = 2 cm³

To Find:

Density of unknown metal

Explanation:

Formula:

$\boxed{ \bold{Density = \frac{Mass}{Volume}}}$

Substituting value of mass & volume in the formula:

$\sf \implies Density = \frac{11.29}{2} \\ \\ \sf \implies Density = 5.645 \: g/cm^3$

3 0

3 years ago

What happens when kmno4 is heated

Dmitrij [34]

Answer:

kmno4 is heated => k2mno4 + mno2 + o2

Hope this helps!

7 0

4 years ago

If part of one of your mothers chromosomes broke off and wasn't transferred to you before you were born, which of the following

kari74 [83]

The answer is letter choice A

6 0

3 years ago

HURRY ⚠️<br> How many Chlorine atoms in 2HCI?<br> Hiw many Hydrogen atoms are in 2HCl?

slega [8]

Answer:

2 in each

Explanation:

5 0

3 years ago

Read 2 more answers

Imagine you were doing a calorimetry experiment to measure the molar enthalpy change for dissolving ammonium chloride (NH4Cl(s))

Bess [88]

Answer:

Volume of water

Initial temperature of the solution

Final temperature of the solution

Mass of NH₄Cl

Explanation:

There are two heat transfers involved in this experiment.

Heat of solution of NH₄Cl + heat lost by water = 0

q₁ + q₂ = 0

nΔH + mCΔT = 0

nΔH = -mCΔT

ΔH = -mCΔT/n

So, you must measure

the volume of water (you will probably use its density to calculate its mass)
the initial and final temperatures of the solution (to calculate ΔT)
the mass of NH₄Cl (to calculate the number of moles)

You will probably assume that the specific heat capacity of the solution is the same as that of water, so you won't be measuring it.

4 0

4 years ago