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Reil [10]
2 years ago
9

Which statement best describes a physical change?

Chemistry
1 answer:
worty [1.4K]2 years ago
3 0

C because it is only the chemical reaction which remain the same

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An electron ______ is an area around the nucleus of an atom where an electron is likely to be found.
jek_recluse [69]

Answer:

orbital

hope this helps! <3

4 0
2 years ago
A reaction was performed in which 4.0 g of cyclohexanol was reacted with an acid catalyst to obtain 2.8 g of cyclohexene. calcul
ioda

Answer:

              %age Yield  =  85.36 %

Solution:

The Balance Chemical Reaction is as follow,

               C₆H₁₂O  +   Acid Catalyst    →    C₆H₁₀  +  Acid Catalyst + H₂O

According to Equation ,

              100 g (1 mole) C₆H₁₂O produces  =  82 g (1 moles) of C₆H₁₀

So,

                       4.0 g of C₆H₁₂O will produce  =  X g of C₆H₁₀

Solving for X,

                      X =  (4.0 g × 82 g) ÷ 100 g

                      X  =  3.28 g of C₆H₁₀   (Theoretical Yield)

As we know,

                     %age Yield  =  (Actual Yield ÷ Theoretical Yield) × 100

                     %age Yield  =  (2.8 g ÷ 3.28 g) × 100

                     %age Yield  =  85.36 %

5 0
2 years ago
Where do glaciers come from
marusya05 [52]

Answer:GLACIERS  ARE MADE UP OF  FALLEN SNOW OVER MILLION YEARS, IN MOST OF POLAR REGIONS  IT TURNS TO ICE AND WILL FLOW DOWNWARDS AND OUTWARDS UNDER ITS OWN PRESSURE

AND THE LARGEST GLACIER IN THE WORLD IS 60 MILES WIDE AND AROUND  270 MILES LONG.

IT COVERS 10% OF EARTH'S TOTAL LAND

Explanation:

4 0
3 years ago
Would the following atoms have similar reactivity?
Sergio [31]
I think D, not sure though!
3 0
2 years ago
Read 2 more answers
A certain radioactive atom has 90 protons and 142 neutrons. If this atom undergoes alpha decay, what is the mass number of the d
Anastaziya [24]

Answer:

228

Explanation:

alpha decay is removing alpha particle _2^{4}He

2 number of protons, 4 mass number = 2 protons + 2 neutrons

We have

      90 protons and 142 neutrons

<u>       - 2 protons         -  2 neutrons</u>

      88 protons         140 neutrons

Mass number of new (daughter) atom = 88 +140 = 228

7 0
3 years ago
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