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3 years ago

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The yellow light given off by a sodium vapor lamp used for public lighting has a wavelength of 589nm. What is the frequency of t

his radiation? (1m=1x10^9)
*please help*

1 answer:

VikaD [51]3 years ago

6 0

Answer:

Explanation:

Answer:

570 nm

Explanation:

The wavelength of an electromagnetic wave is given by:

\lambda=\frac{c}{f}

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If a man has a mass of 83 kilograms on Earth, what will the force of gravity on his body be on the moon? A. 135.6 N B. 318.5 N C

diamong [38]

First, we need to know what's the gravity value in the moon. it is 1.622 m/ s2

to find the force, let's recall this formula----> Force= mass x gravity

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What does the 3 indicate in 1s22s22p63s1?

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The 3 indicates the third electron shell. (Which has only 1 electron in it in this configuration)

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(a)-Use Lewis symbol store present there action that occurs between Ca and F atoms. (b)-What is the chemical formula of the most

Charra [1.4K]

Answer:

(a) The Lewis structure is shown in the image below.

(b) $CaF_2$

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(d) Calcium atom loses electrons.

Explanation:

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There are 2 valence electrons of Calcium.

Fluorine is the element of group 17 and second period. The electronic configuration of the element fluorine is - 2, 7 or $1s^22s^22p^5$

There is 1 valence electron of fluorine.

The Lewis structure is drawn in such a way that the octet of each atom is complete.

Thus, calcium loses 2 electrons to 2 atoms of fluorine and these 2 atoms of fluorine accepts each electron to form ionic bond. This is done in order that the octet of the atoms are complete and they become stable.

Thus, the formula of calcium chloride is $CaF_2$ .

<u>(a) The Lewis structure is shown in the image below.</u>

<u>(b) $CaF_2$ </u>

<u>(c) Calcium loses 2 electrons to 2 atoms of fluorine and these 2 atoms of fluorine accepts each electron to form ionic bond.</u>

<u>(d) Calcium atom loses electrons.</u>

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3 years ago

What mass of NaCl would you have dilute to 1L to make up a 0.25M solution?<br> Asap please

gavmur [86]

Answer: 0.25m

Im not sure but i think

Explanation:0.25/0.25

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