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Sedaia [141]
3 years ago
12

What temperature does ice freeze

Chemistry
2 answers:
Gwar [14]3 years ago
8 0

Answer:

32°F

Explanation:

Water freezes at 32°F.

Vlad1618 [11]3 years ago
6 0

Answer:

At 0 celcius or 32 Fahrenheit

Explanation:

when you want to freeze a substance like water it has to be at that temperature 0 Celsius or 32 Fahrenheit. Also it's not at exact, for example you put the water in 0 celcius and it freeze ni wait a few minutes and it would be frozen.

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Environmental pollution with chemicals <br> how does it affect countries and economies
netineya [11]

Answer:

The most recent Global Burden of

Disease (GBD) study estimates that air pollution – indoor and outdoor combined – was the cause of 5.5 million premature deaths

globally in 2013. Air pollution also has further consequences on human health, leading in particular to an increasing number of

respiratory and cardiovascular diseases. Moreover, it affects crop yields and the environment, with impacts on biodiversity and

ecosystems, amongst others. These impacts have significant economic consequences, which will affect economic growth as well as welfare

Explanation:

5 0
2 years ago
HELP!!!!!!PLZ!!!!!ASAP!!!!!
AfilCa [17]
It is an open series circuit and this is why:
 
its obvious its a series circuit because all the symbols are in a straight rectangle. 
its an open circuit because an open circuit has something that doesn't allow the electrons to flow all the way. and the thing blocking the electrons it the switch which is open, (off).

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8 0
2 years ago
Would anyone be able to give a good explanation of what
mezya [45]

Answer and Explanation:

Aspirin is odorless, but when left exposed to air in the environment, it gradually hydrolyzes into salicylic acid and acetic acid as that is the precursor for synthesizing Aspirin.

Using this hydrolyzed aspirin for titration would not be advised, because it would affect the reading of the titration. Ordinarily, apsirin is a weak acid and direct titration of aspirin is problematic because it hydrolyzes pretty fast to salicylic acid— leading to an unwanted side reaction which may or may not go to completion. Therefore, excess base must be added and heat is supplied to the mixture so that neutralization and hydrolysis are complete. The remaining base is then titrated. This is called back titration.

Now, in back titration, instead of using solution whose concentration is expected to be known, we rather use excess volume of reactant which has been left over after the completion of a reaction with the analyte.

In this case, we use an alkali, preferably NaOH (1.0 mol/dm³). Te unused NaOH remaining after the hydrolysis is titrated against a standard HCl (0.1 mol/dm³). Then from the reaction equation of the aspirin and sodium hydroxide, the amount of NaOH required for the hydrolysis can be calculated.

Answering whether the titration goes up or down, it would be observed that the titration reading would GO DOWN because the exposed aspirin used has experienced some form of hydrolysis before it was used for titration, so the hydrolysis reaction it would undergo with acetyl-salicylic acid would be minimal, and this would affect the titration reading.

But if the aspirin wasn't left exposed to the environment, the reading would go up since more hydrolysis would take place in this case.

3 0
3 years ago
Enter the net ionic equation, including phases, for the reaction of AgNO3 (aq) and KCl(aq). Refer to the solubility rules as nee
artcher [175]

Answer:

Explanation: you need to remove the subscript of 5

3 0
3 years ago
Read 2 more answers
Thermal energy is the _____ and internal energy is the _____
Lubov Fominskaja [6]

Answer:

Average kinetic energy of the particles in an object.

Total energy of particles in an object.

Explanation:

Thermal energy is the _average kinetic energy of the particles in an object____ and internal energy is the ___total energy of particles in an object__.

Thermal energy is a form of kinetic energy. Kinetic energy is due the change in position of a body or the motion of a body. When we apply thermal energy to a system, the particles gain kinetic energy which causes the motion of its particles.

The internal energy of system is the sum of all the total energy of particles contained in the object. It is given as the change between the kinetic and potential energy of a system.

8 0
3 years ago
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