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Kazeer [188]
3 years ago
10

Need help ASAP with this question

Chemistry
1 answer:
Karo-lina-s [1.5K]3 years ago
8 0

Answer: noble gasses

Explanation: zoom on on the red section and look at the key for what red means.

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An atom of argon has a radius rar = 88 pm and an average speed in the gas phase at 25°C of 172 m/s.
Rudik [331]

Answer:

1.2* 10³ rNe.

Explanation:

Given speed of neon=350 m/s

Un-certainity in speed= (0.01/100) *350 =0.035 m/s

As per heisenberg uncertainity principle

Δx*mΔv ≥\frac{h}{4\pi }

4π

h

..................(1)

mass of neon atom =\frac{20*10^{-3} }{6.22*10^{-23} } =3.35*10^{-26} kg

6.22∗10

−23

20∗10

−3

=3.35∗10

−26

kg

substituating the values in eq. (1)

Δx =4.49*10^{-8}10

−8

m

In terms of rNe i.e 38 pm= 38*10^{-12}10

−12

Δx=\frac{4.49*10^{-8} }{38*10^{-12} }

38∗10

−12

4.49∗10

−8

=0.118*10^{4}10

4

* (rNe)

=1.18*10³ rN

= 1.2* 10³ rNe.

Explanation:

This is the answer

7 0
3 years ago
The government, through the FCC (Federal Communications Commission), has set rules and guidelines for the use of radio equipment
Doss [256]

Answer:

Wavelength = 0.06024 m

Explanation:

Equation of energy of wavelength from Einstein's relativity equation is;

E = hc/λ

Where;

h is Planck's constant = 6.626 × 10⁻³⁴ J. s

c is speed of light = 3 × 10⁸

We are given E = 3.3 × 10^(-24) J

Making wavelength λ the subject, we have;

λ = hc/E

Thus;

(6.626 × 10⁻³⁴ × 3 × 10⁸)/(3.3 × 10^(-24)) = 6.024 × 10^(-2) = 0.06024 m

Wavelength = 0.06024 m

5 0
3 years ago
The correct name for the molecule IgBr7 is:
siniylev [52]

Answer:

(iodine?) heptabromide

Explanation:

Not sure what element Ig is but use that name and then heptabromide.

7 0
3 years ago
Why is it important for you to bring your line of sight down to the level of the meniscus?
Aleksandr-060686 [28]

Answer:

If you are not eye to eye with the miniscus you would be reading wrong because you have to read right from the middle because of you won’t you’d always be off

Explanation:

4 0
2 years ago
What is an example of an inert element?​
Harlamova29_29 [7]

Answer:

There are some like Argon, Helium, and Krypton.

Explanation:

Basically any noble gases hope this helps :3

5 0
3 years ago
Read 2 more answers
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