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gavmur [86]
3 years ago
6

What is a radical in chemistry ?

Chemistry
1 answer:
anygoal [31]3 years ago
3 0

Answer: In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron.

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C12H22O11 is an example of a(n):
ycow [4]

Answer:

molecular compound

Explanation:

it has two or more nonmetal elements and are covalently bonded

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Which correctly lists the three gases that are part of Earth's cycles in both the atmosphere and biosphere?
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The correct answer is actually, B) carbon dioxide, nitrogen, oxygen

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to be honestl id ldm

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True or false To obtain a salt, a metal must be combined with a hydroxide
Darya [45]

Answer:

False

Explanation:

The statement is implying that this is the only way to obtain a salt.  Any ionic compound is a salt.  For example, NaCl (table salt) is an ionic compound.  It is the combination of a nonmetal (Cl) and a metal (Na).

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3 years ago
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A 20 kg curling stone is sliding in a positive direction at 4 m/s. A second curling stone is sliding at the same speed but in th
solniwko [45]

Answer:

The kinetic energy of the two stones is 320 J

Explanation:

Kinetic energy is the energy that a body possesses due to its movement. So it is the capacity or work that allows an object to go from being at rest, or still, to moving at a certain speed.

In other words, the kinetic energy of an object is that which is produced due to its motion and depends on its mass and velocity as follows:

Ec=\frac{1}{2} *m*v^{2}

where the kinetic energy Ec is measured in joules (J), the mass m is measured in kilograms (kg) and the velocity v in meters/second (m/s).

In this case you know that a 20 kg curling stone is sliding in a positive direction at 4 m/s. So:

  • m= 20 kg
  • v= 4 m/s

Replacing you have:

Ec_{1} =\frac{1}{2} *20 kg*(4\frac{m}{s}) ^{2}

Ec₁= 160 J

A second curling stone slides at the same speed but in the opposite direction. So:

  • m= 20 kg
  • v= - 4 m/s

Replacing you have:

Ec_{2} =\frac{1}{2} *20 kg*(-4\frac{m}{s}) ^{2}

Ec₂= 160 J

The kinetic energy of the two stones is calculated as:

Ec= Ec₁ + Ec₂

Ec= 160 J + 160 J

Ec= 320 J

<u><em>The kinetic energy of the two stones is 320 J</em></u>

7 0
3 years ago
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