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Genrish500 [490]
3 years ago
9

A man drove his car through the Nevada desert one day when the temperature was over 100°F. When he started the trip, the gas sta

tion attendant found the tire to be 32 lb/in2. When he filled up with gas after crossing the desert, an attendant found the tire pressure to be 38 lb/in2. What is the best explanation for the increase in tire pressure?
The road wear on the tire caused a decrease in volume and, therefore, an increase in tire pressure.
The temperature in the tire increased, causing an increased tire pressure.
The hot temperature caused the springs to expand, which allowed more weight to ride on the tires, thus causing more pressure inside.
The measurements of the pressure were inaccurate. The added weight of the gas caused the extra pressure in the tires.
Chemistry
1 answer:
Slav-nsk [51]3 years ago
7 0
<span>The temperature in the tire increased, causing an increased tire pressure. :D</span>
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Calculate the maximum wavelength of light that will cause the photoelectric
Drupady [299]

Answer:

Explanation:

Work function of potassium = 2.29 eV = 3.67 X 10⁻¹⁹ J

So the minimum energy of photon must be equal to 3.67 X 10⁻¹⁹ J .

energy of photon of wavelength λ = hc / λ

where h = 6.67  x 10⁻³⁴

c = 3 x 10⁸

Putting the values in the equation above

6.67  x 10⁻³⁴  x  3 x 10⁸ / λ =  3.67 X 10⁻¹⁹

λ  = 6.67  x 10⁻³⁴  x  3 x 10⁸ /  3.67 X 10⁻¹⁹

= 5.452 x 10⁻⁷

= 5452 x 10⁻¹⁰ m

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6 0
3 years ago
Label each of the following changes as a physical change or chemical change. Give evidence to support your answer.
SVEN [57.7K]

Answer:

A catalytic converter changes nitrogen dioxide to nitrogen gas and oxygen gas is a chemical change.

Explanation:

Hello.

In this case, since physical changes do not modify the molecular composition and structure of the material undergoing it whereas the chemical change does, for catalytic converters we should know they promote chemical reaction in which the composition is changed; for instance, for the given example, the following chemical reaction is the evidence:

2NO_2\rightarrow N_2+O_2

As you can see, nitrogen and oxygen are no longer bonded but separated by themselves, therefore, this is a chemical change.

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3 0
3 years ago
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vivado [14]

Answer:

1, 3, 2

Explanation:

N2 + H2 → NH3

I usually find that the best way to systematically balance an equation by inspection is to start with the most complicated-looking formula and then balance atoms in the order:

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1N2 + H2 → 2NH3

(c) Balance H.

We have fixed 6 H on the right, so we need 6 H on the left. Put a 3 in front of H2.

1N2 + 3H2 → 2NH3

The equation is now balanced, and the coefficients are 1, 3, 2.

5 0
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PSYCHO15rus [73]

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The law of conservation of mass represents a balanced chemical equation​.

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Answer:

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