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gayaneshka [121]
3 years ago
11

How fast do you think the air particles in this room are moving compared to a car going 50 mph (about 22m/s)? Put your answer is

in the form, 'a molecule travels ___ as fast as a car"
Chemistry
1 answer:
Minchanka [31]3 years ago
5 0

The average molecule of air is moving at speed of 500 m /s and thus

speed of air particle = 500 m /s

speed of car = 22 m /s

Whereas, the speed of molecule /speed of car = 500 /22 = 22.72

Thus, molecule travel at 22.72 times faster than speed of car.

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Identify a false statement about how to protect iron from corrosion.
DIA [1.3K]
False: to protect iron from corrosion, keep it near moistureband oxygen.
3 0
3 years ago
A car is traveling with an initial velocity of 15 m/s when the driver decides to go faster by accelerating at 5 m/s2 for 10 seco
Ilia_Sergeevich [38]

Answer: Time needed: 2.5 s

Distance covered: 31.3 m

Explanation:

I'll start with the distance covered while decelerating. Since you know that the initial speed of the car is 15.0 m/s, and that its final speed must by 10.0 m/s, you can use the known acceleration to determine the distance covered by

 

on one side of the equation and solve by plugging your values

To get the time needed to reach this speed, i.e. 10.0 m/s, you can use the following equation

Explanation:

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2 years ago
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4 0
3 years ago
Which substance is correctly identified as a homogeneous or heterogeneous mixture?
larisa86 [58]

Answer:

A

Explanation:

A salad with lettuce, cheese, seeds, tomatoes, broccoli, and other vegetables is an example of a heterogeneous mixture.

Milk is not mixed with anything so that is incorrect

River water is mixed in with dirt and minerals so this one is incorrect

Beach sand is incorrect because you can see colored particles.

7 0
3 years ago
Compare the change in pH with the addition of acid and base to deionized water and to a buffer.
iogann1982 [59]

Answer:

case1.

The addition of acid and base leads to a change in pH of the water when adding to deionized water due to fact that acid and bases dissociated in dissolving in water. If the H+ ion increases in the water as acid addition hikes it, it will result in decreasing the pH value. The intensity of the acid also affects the dissociation of the ions.

case2

Buffers are normally formed by weak acid and its conjugate base, and adding acid to the buffer it absorbs the H+ ions so the pH will be lower and adding base or increase of OH- conjugate base resists the pH value to increase.

5 0
2 years ago
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