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3 years ago

A 42.2 g sample of acetic acid is heated using 1043 cal. What is the change temperature of the acetic acid?

Chemistry

1 answer:

Slav-nsk [51]3 years ago

8 0

Answer:

H=mc∆T

∆T = H/mc

You have the mass and Heat Energy applied

Get the specific Heat capacity of acetic acid

Plug it into the formula...You should get the answer you're looking for

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What would happen if you added more than 5 mL of yeast solution to the H2O2?

Marat540 [252]

Answer: -

Hydrogen peroxide breaks down into water and oxygen.

2H₂O₂ → 2H₂O + O₂

The yeast present contains an enzyme called catalase which catalyses the reaction.

More the amount of the catalyst added, faster will be the decomposition of the hydrogen peroxide.

Thus if we added more than 5 mL of yeast solution to the 2H₂O₂, the breakdown would occur faster. Thus the bubbles and the accompanying fizz would be much more.

3 0

3 years ago

A sample of rainwater is tested with the indicator bromothymol blue and it turns yellow. What is most likely PH of rainwater? 4,

kirill [66]

Answer:

Explanation:

bromothymol blue turns yellow betwwen then pH levels of 2 and 6

7 0

4 years ago

3. The molar volume of a gas at STP occupies 0 1 kilopascal O ooc 12 grams 22.4 L

Reil [10]

The molar volume of a gas at STP occupies 22.4 L.

Option D

Explanation:

To find the volume of 1 mole of a gas at STP, we use the Ideal Gas Law. It is the general gas equation which gives the relation to the measurable quantities to an ideal gas as below,

P (pressure) × V (volume) = n (number of moles) × R (the gas constant) × T (temperature in Kelvin)

STP = 1 atm of pressure and 273 K for temperature

P = 1 atm

V = ?

n = 1 mole

R = 0.0821 atm L/mol K

T = 273 K

Using the equation,

$\mathrm{PV}=\mathrm{nRT}$

$V=\frac{n R T}{P}$

By substituting the above values, in the equation,

$V=\frac{1 \times 0.082 \times 273}{1}=22.38\ L$

V = 22.38 L

8 0

3 years ago

If you had a mixture of ethanol, glycerol, ethylene glycol, methanol, and water, how could you separate these five substances ou

leonid [27]

Fractional distillation

Explanation:

The best way to separate the mixtures out is through the process of fractional distillation.

In fractional distillation, liquid - liquid mixtures are separated based on the differences in boiling point of their components. Let us examine the boiling points of the component of the mixtures:

Ethanol 78⁰C

Glycerol 290⁰C

Ethylene glycol 197.6⁰C

Methanol 64.7⁰C

Water 100⁰C

We see that the liquids in the mixture have different boiling points. In this process, the mixture is heated in a distillation column. When the boiling point of any component is reached, it will rise up in the column and can be channeled to a condenser where it is cooled and collected.

The liquid with the least boiling point is first separated with the one with the highest boiling is recovered last:

Order of recovery;

Methanol 64.7⁰C

Ethanol 78⁰C

Water 100⁰C

Ethylene glycol 197.6⁰C

Glycerol 290⁰C

Learn more:

Physical properties brainly.com/question/10972073

#learnwithBrainly

3 0

3 years ago

Which element is a metalloid? Si Ne Br2 Cl2

goldenfox [79]

Answer:

There are 2 answers. A and C

Explanation:

Si is Silicon, which is a metalloid,

Br2 is Bromine, which is a metalloid

3 0

3 years ago