3 years ago

Explain how we use a spectrometer to help us determine what stars and planets are made of?

1 answer:

4 0

We use a spectrometer to help us determine what stars and planets are made of by passing a light through various chemical elements, different spectral patterns are created. By matching those patterns up to patterns generated in a laboratory environment we can tell what the composition of a distant star or planet is.

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nert xenon actually forms many compounds, especially with highly electronegative fluorine. The ΔH o f values for xenon difluorid

loris [4]

Answer:

For Xenon fluoride, the average bond energy is 132kj/mol

For tetraflouride,the average bond energy is 150.5kj/mol.

For hexaflouride, the average bond energy is 146.5 kj/mol

Explanation:

For xenon fluoride

105/2 = 52.5

For F-F

159/2 = 79.5

Average bond energy of Xe-F = 79.5 + 52.5 = 132kj/mole

For tetraflouride

284/4 = 71

For F-F

159/2 = 79.5

Average bond energy = 79.5 + 71 = 150.5kj/mol

For hexaflouride

402/6 = 67

F-F = 159/2 = 79.5

Average bond energy = 67 + 79.5 = 146.5kj/ mol

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3 years ago

Technician A says that wheel cylinder dust boots keep dust and moisture out of the cylinder bore. Technician B says that it is n

timurjin [86]

Answer:

i think its technician A

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4 years ago

9. To completely describe the motion of an object, you need

pav-90 [236]

I think it’s D) all of the above

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3 years ago

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Ride and average of 15mph for 30 miles, how long does it take?

dalvyx [7]

Answer:

2 hrs

Explanation:

time = distance ÷ speed

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4 years ago

A 6.0 kg object undergoes an acceleration of 2.0 m/s2 .

Alenkinab [10]

A. Fnet=ma
6*2=12N of force acting on the object in the direction it is accelerating

B. Fnet=ma
4*2=8N of force action on the object in the direction it is accelerating

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3 years ago