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3 years ago

which field or study (organic chemistry or inorganic chemistry) includes the study of the properties and preparation of chalk?

Chemistry

1 answer:

jeka57 [31]3 years ago

3 0

Answer:the answer is d

Explanation:

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For many purposes we can treat propane

dangina [55]

Answer:The volume increases by 11%

Explanation:

When the pressure is decreased, the volume must definitely increase, to maintain the same pressure, the temperature must then also be increased as we see in the question. The volume was increased just as the pressure decreased and the temperature had to be increased to maintain a constant pressure. We have applied the general gas equation in solving the problem.

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4 years ago

Barbiturates are synthetic drugs used as sedatives and hypnotics. Barbital ( = 184.2 g/mol) is one of the simplest of these drug

DanielleElmas [232]

Answer:

118.75°C is the boiling point of a solution.

Explanation:

Mass of the solute that is barbiturates = 42.5 g

Molar mass of a solute = 184.2 g/mol

Moles of solute = $\frac{42.5 g}{184.2 g/mol}=0.2307 mol$

Mass of the solvent that acetic acid = 825 g = 0.825 kg

$molality=\frac{\text{Moles of solute}}{\text{Mass of solvent}}$

Molality of the solution (m):

$m=\frac{0.2307 mol}{0.825 kg}=0.2796 m$

Elevation in boiling point is given as:

$\Delta T_b=i\times K_b\times m$

i = 1 (organic compound)

$=1\times 3.07^oC/m\times 0.2796 m=0.8585^oC$

$\Delta T_b=T_b-T$

$T_b$ = Boiling temperature of solution.

T = boiling temperature of solvent that is acetic acid=117.9°C

$0.8585^oC=T_b-117.9^oC$

$T_b=118.75 ^oC$

118.75°C is the boiling point of a solution.

6 0

3 years ago

identify what type of mixture powdered chalk and powdered table salt is and suggest a technique for separating their components

Iteru [2.4K]

This is a homogenous mixture because you cannot differentiate between the members of the mixture. A technique might be heating them until one melts and evaporates due to different boiling temperatures, or mixing them together with fluids that would dissolve one, yet keep the other one whole.

7 0

3 years ago

Who believed and tested his idea that microorganisms are carried through the air?

kondor19780726 [428]

Louis Pasteur designed a procedure to test whether sterile nutrient broth could spontaneously generate microbial life. To do this, he set up two experiments.

Hope this helps !

Have a great day! :)

7 0

3 years ago

Read 2 more answers

What is the symbol for aluminum and sulphur ?

borishaifa [10]

<em><u>The formula for aluminum sulfide is Al2 S3.</u></em>

<h2><em>hope it helps</em><em>!</em></h2>

4 0

3 years ago

Read 2 more answers