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Debora [2.8K]
2 years ago
10

explain observation made when anhydrous calcium chloride and anhydrous copper (ii) sulphate are separately exposed to the atmosp

here for about two days​
Chemistry
1 answer:
Burka [1]2 years ago
6 0

Answer:

Anhydrous calcium chloride  dissolves and becomes liquid

Anhydrous copper (ii) sulphate will produce crystal particles

Explanation:

Anhydrous calcium chloride is deliquescent and hence when it is exposed to air, it absorbs water from air. After absorbing water, it dissolves and after some time a pool of clear liquid appears.

Anhydrous copper (ii) sulphate will form crystal structures  and the following reaction will takes place

CuSO4 + 5 H20 --> CuSO4.5H2O

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Covalent bonds in a molecule absorb radiation in the IR region and vibrate at characteristic frequencies.
vazorg [7]

Answer:

Frequency=1.6\times 10^{12}\ Hz

Explanation:

The relation between frequency and wavelength is shown below as:

c=frequency\times Wavelength


c is the speed of light having value 3\times 10^8\ m/s

Given, Wavelength = 188 μm

Also, 1 μm = 10^{-6} nm

So,  

Wavelength = 188\times 10^{-6} m

Thus, Frequency is:

Frequency=\frac{c}{Wavelength}

Frequency=\frac{3\times 10^8}{188\times 10^{-6}}\ Hz

Frequency=1.6\times 10^{12}\ Hz

7 0
3 years ago
Choose two of the following scientists: Anton Lavoisier, John Dalton, JJ Thomson, Robert Millikan, Ernest Rutherford, James Chad
elixir [45]

Answer:

John Dalton:

John Dalton was the scientist who introduced atomic theory in the field of chemistry. Dalton worked on different gases and formulated this theory. The main points of Dalton's theory are:

  • Every element present is made up of atoms.
  • Atoms of an elements are have the same same properties whereas these properties are different for each element.
  • According to his theory, an atom could not be broken down.
  • Different atoms combine or get separated from each other during a chemical reaction.

Ernest Rutherford:

Ernest Rutherford is known as the father of nuclear physics due to his impressing research work on radioactivity of atoms. Rutherford was the first scientist to discover the nucleus of an atom and prove that the nucleus was charged. He also described that the electrons circle around the nucleus of an atom.

6 0
3 years ago
A sample of water vapor has a volume of 3.15 L, a pressure of 2.40 atm, and a temperature of 325 K. What is the new temperature,
lara31 [8.8K]

Answer:

The answer to your question is:   T2 = 235.44 °K

Explanation:

Data

V1 = 3.15 L                    V2 = 2.78 L

P1 = 2.40 atm               P2 = 1.97 atm

T1 = 325°K                    T2 = ?

Formula

\frac{P1V1}{T1} = \frac{P2V2}{T2}

Process

            T2 = (P2V2T1) / (P1V1)

            T2 = (1.97x 2.78x 325) / (2.40 x 3.15)

            T2 = 1779.895 / 7.56

            T2 = 235.44 °K

4 0
3 years ago
PLEASE HELP <br> C. Balance these fossil-fuel combustion reactions. (1 point)
Damm [24]

Answer:

C8H18(g) + 12.5O2(g) -> __8__CO2(g) + 9H2O(g) + heat

CH4(g) + _2___O2(g) -> ____CO2(g) + _2___H2O(g) + heat

C3H8(g) + _5___O2(g) -> _3___CO2(g) + __4__H2O(g) + heat

2C6H6(g) + __15__O2(g) ->  __12__CO2(g) + __6__H2O(g) + heat

Explanation:

I hope it helps!

7 0
3 years ago
Which of the following is a nonrenewable resource?
maks197457 [2]

Answer:

I think the answer is A!!!

3 0
3 years ago
Read 2 more answers
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