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melomori [17]
3 years ago
7

Is trimming a bush because it grows too tall a chemical or physical change

Chemistry
1 answer:
professor190 [17]3 years ago
8 0

Answer:

Physical Change

Explanation:

The bush is changing shapes, not changing what it is.

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What would probably happen to the south equator if South America wasn’t there?
Liono4ka [1.6K]

It would keep traveling westward

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3 years ago
What happens to Earth’s axis of rotation as Earth orbits the Sun?
Margarita [4]

Answer:As the Earth orbits the Sun, the tilt of Earth's axis stays lined up with the North Star. The North Pole is tilted towards the Sun and the Sun's rays strike the Northern Hemisphere more directly in summer. ... The tilt of Earth's axis points away from the Sun.

6 0
3 years ago
Write the symbolic notation of an isotope of an element having 8 protons, 8 electrons, and 9 neutrons
Mariulka [41]
The number of protons uniquely identifies the element. This is not on the periodic table. Isotopic notationincludes the atomic number and the mass number. 8 17 This isotope of oxygen has 8 protons (atomic number), 8 electrons and 9 neutrons
7 0
3 years ago
How many amperes would be needed to produce 60.0 grams of magnesium during the electrolysis of molten mgcl 2 in 2.00 hours?
Shalnov [3]

Answer:

\boxed{\text{66.2 A}}

Explanation:

1. Write the equation for the reaction.

M_r:                 24.30

          MgCl₂ ⟶ Mg + Cl₂

m/g:                   60.0

2. Calculate the moles of Mg

Moles of Mg = 60.0 g Mg × (1 mol Mg/ 24.30 g Mg) = 2.469 mol Mg

3. Calculate the moles of electrons

Moles of electrons = 2.469 mol Mg × (2 mol electrons/1 mol Mg)

= 4.938 mol electrons

4. Calculate the number of coulombs

Q = 4.938 mol electrons × (96 485 C/1 mol electrons) = 476 500 C

5. Calculate the current required

Q  = It

I = Q/t

t = 2.00 h × (60 min/1h) × (60 s/1 min) = 7200 s

I = 476 500 C/7600 s= 66.2 C/s = 66.2 A

You need a current of \boxed{\textbf{66.2 A}}.

8 0
3 years ago
Why is actual yield less than theoretical.
slega [8]

Answer:

In an actual reaction, unless circumstances are absolutely perfect (which never occurs), the reactants do not completely react with one another. Theoretical yields are expected yields if every bit of each reactants completely reacts with the others.

6 0
2 years ago
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