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Mice21 [21]
3 years ago
13

Plz help the periodic change between night and day is caused by

Chemistry
2 answers:
Anestetic [448]3 years ago
8 0

Answer:

The earth rotating is what causes day and night to happen

Explanation:

olga55 [171]3 years ago
6 0
The earth rotating is what causes day and night to happen
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How much faster does helium escape through a porous container than ozone?
otez555 [7]
According to Graham's Law ," the rates of effusion or diffusion of two gases are inversely proportional to the square root of their molecular masses at given pressure and temperature".

                                r₁ / r₂  =  \sqrt{M2 / M1}   ---- (1)

r₁    =  Rate of effusion of He

r₂    =  Rate of Effusion of O₃

M₁  =  Molecular Mass of He  =  4 g/mol

M₂  =  Molecular Mass of O₃  =  48 g/mol

Putting values in eq. 1,

                                r₁ / r₂  =  \sqrt{48 / 4}

                                r₁ / r₂  =  \sqrt{12}

                                r₁ / r₂  =  3.46

Result:
          Therefore, Helium will effuse 3.46 times more faster than Ozone.
4 0
3 years ago
A store has notebooks worth<br>$1.60. The store adds a<br>30% markup. How much is<br>the markup?​
Hoochie [10]

Answer: $0.48

Explanation: $1.60×0.30= 0.48

6 0
3 years ago
What does the term organic mean in chemistry? natural containing carbon using no pesticides within the periodic table
dem82 [27]

The organic meaning  in  chemistry  is natural  containing  carbon.


    <u><em> Explanation</em></u>

The natural  matter or compounds   which  contain carbon are referred to as organic  compounds.  

Example of organic compound  is protein  which are made up of amino acid.

Amino acid  is made up of   carbon, hydrogen oxygen  and nitrogen  atoms.


3 0
3 years ago
Read 2 more answers
________ is an atom that gains electrons; it's valence electrons is similar to a noble gas.
andre [41]

Answer:

nonmetal

________ is an atom that gains electrons; it's valence electrons is similar to a noble gas.

Explanation:

Because non metal like chlorine gain one elctron and attain electronic configuration of noble gas Argon

4 0
3 years ago
Which statement most completely describes an object's motion?
sammy [17]

Answer:

Explanation:

First one or fourth one

7 0
3 years ago
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