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MArishka [77]
3 years ago
14

You are testing an unknown liquid to determine its identity. First you heat the liquid and find that it turns to gas at 80 degre

es Celsius. Then you add sodium to a small amount of the liquid to see if it reacts.Last you try to burn the liquid to see if it is flammable.
Which physical property of the
liquid did you test?

A. boiling point
B. ability to conduct electricity
C. combustibility
D. melting point
Chemistry
1 answer:
SVETLANKA909090 [29]3 years ago
7 0

Answer: The answer is <u><em>(Boiling Point) </em></u>:)

<u><em /></u>

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Helium is a small spherical atom with only a two electrons, so its atoms have quite weak attractions to each other.

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3 years ago
Calculate the wavelength of a football (425g) thrown by an NFL quarterback traveling at 50mph
AnnyKZ [126]

Wavelength is 6.976 x 10^ -35 m

Explanation:

In this, we can use De Broglie’s equation. This equation is the relationship between De Broglie’s wavelength, velocity and the mass of a moving object. In this equation, we are using plank's constant which is 6.626 x 10^-34 m^2 kg/s.

We know that one mile per hour is equivalent to 0.447 M/S.

And One gram is equivalent to 10^-3 kg.

De Broglie’s wavelength = λ ( wave length) = Plank’s constant/ Mass x velocity

λ ( wave length) = 6.626 x 10^ -34/ (425 x10^-3) x ( 50 x 0.447)

                                 = 6.626 x 10^ -34/ 0. 425 x 22.35

                                 = 6.626 x 10^ -34/ 9.498

                                 = 6.976 x10^ -35 m

So, the wavelength of the football will be 6.976 x 10^ -35 m

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