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RideAnS [48]
3 years ago
15

which example would most likely decrease friction? using cleats, rather than gym shoes, on a field using shaving cream, rather t

han shaving on dry skin using a wide parachute, rather than a narrow parachute, when skydiving using sandpaper, rather than regular paper, on wood
Chemistry
2 answers:
rosijanka [135]3 years ago
4 0
"<span>using shaving cream, rather than shaving on dry skin" I believe this is the answer. coz rest of them would increase friction rather than decrease</span>
Nataly [62]3 years ago
3 0

The answer is: using shaving cream, rather than shaving on dry skin.

Friction is the force resisting the relative motion of solid surfaces, fluid layers and material elements sliding against each other.

Shaving would be much easer using shaving cream, because friction is decreased.

This is example of decreasing skin friction.

Skin friction is the force resisting the motion of a fluid across the surface of a body.

Other examples cause increase of friction.

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Atoms that are sp2 hybridized form how many pi bonds?
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Be sure to answer all parts. Nitric oxide, NO·, is a radical thought to cause ozone destruction by a mechanism similar to that o
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See image attached and explanation

Explanation:

The stratospheric ozone layer is very important in absorbing high-energy ultraviolet radiation that is harmful to living systems on earth. The concentration of ozone in the stratosphere is determined by both thermal and photochemical pathways for its decomposition. Nitric oxide, NO, is a trace constituent in the stratosphere that reacts with ozone to form nitrogen dioxide, NO2, and the diatomic oxygen molecule. The nitrogen-oxygen bond in NO2 is relatively weak. When an NO2 molecule encounters an oxygen atom, it transfers an oxygen, forming O2 and NO. The chemical reactions involved are formations of NO2 following by reaction of NO2 with atomic oxygen for form NO and O2. The sum of both reactions show that the overall reaction is simply the reaction of ozone with atomic oxygen to form two molecules of molecular oxygen. Hence, NO only serves as a catalyst, it does not undergo a permanent change itself.

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3 years ago
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4 years ago
Read 2 more answers
If the formation of NaCl proceeds according to the following equation and change in enthalpy, what is the reaction and change in
Sergio039 [100]

Answer:

  • <em>2NaCl → 2Na + Cl₂, ΔH = 822 kJ </em>

Explanation:

The chemical <em>equation</em> for the <em>formation of NaCl</em> is:

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That equation means that 1 mole of NaCl is formed by the reaction of 1 mole of Na and 1/2 mole of Cl₂, with a release of energy of 411 kJ.

The <em>decomposition</em> of <em>NaCl</em> is the inverse of the <em>formation</em> reaction; thus, you swift products and reactants and inverse the sign of the <em>change in enthalpy:</em>

  • NaCl → Na + 1/2 Cl₂, ΔH = 411 kJ

Since you want the decomposition of 2 moles you multiply the equation and the ΔH by 2:

  • 2NaCl → 2Na + Cl₂, ΔH = 822 kJ ← answer

3 0
3 years ago
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