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3 years ago

True or False: It is OK to use wet glassware for the aspirin synthesis without potentially affecting your yield

Chemistry

1 answer:

vesna_86 [32]3 years ago

5 0

Answer:

False

Explanation:

Laboratory synthesis of aspirin is done by the acetylation of salicylic acid with the help of acetic anhydride .

As , the acid anhydride is very sensitive to moisture , as it can hydrolyze into two molecules of acids,

Hence , the reaction involving acid anhydride are conducted in anhydrous solvents .

Hence ,

if water is present in the glassware then , some of the acetic anhydride is wasted , Which in turns reduces the yield than that expected .

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Answer:

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3 years ago

What shows the number of protons in it's nucleus

user100 [1]

The Atomic Number.

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3 years ago

Sample of gas initially occupies 4.25 L at a pressure of 0.850 atm at 23.0°C. What will the volume be if the temperature is chan

Aliun [14]

Answer: 2.34 L

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas = 0.850 atm

$P_2$ = final pressure of gas = 1.50 atm

$V_1$ = initial volume of gas = 4.25 L

$V_2$ = final volume of gas = ?

$T_1$ = initial temperature of gas = $23.0^oC=273+23.0=293.0K$

$T_2$ = final temperature of gas = $11.5^oC=273+11.5=284.5K$

Now put all the given values in the above equation, we get:

$\frac{0.850\times 4.25}{293.0K}=\frac{1.50\times V_2}{284.5}$

$V_2=2.34L$

Thus the final volume will be 2.34 L

3 0

3 years ago

What is the total pressure in mm Hg?

Alekssandra [29.7K]

Answer:

1.5 atm

Explanation:

4 0

3 years ago

What mineral is this. Nearly rectangular in shape and approximately 5 cm by 7 cm in size. Blackish in color with a shiny but non

IgorC [24]

Answer:

The mineral we are talking about here is Biotite Mica. 

Explanation:

Structure of this material is Rectangular in shape and color that we are suggested here is black which is true for biotite Mica And various between black to dark brown.

Because it A Shiny although the luster is nonmetallic in nature. It has a hardness that varies from 2.5 to 3. The cleavage being perfect as it can be Separated into different and thin sheets.

7 0

3 years ago