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mina [271]
2 years ago
8

Astatine, At, is below iodine in Group 17 of the Periodic Table. Which statement is most likely to be correct?

Chemistry
1 answer:
Sphinxa [80]2 years ago
8 0
The answer is A hope this helps
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In naming the compound PCl5, the prefix used with the second element is ____________________.
Oksanka [162]

Answer:

\boxed {\boxed {\sf Hepta}}

Explanation:

We are given the formula:

PCl_5

This is a molecular formula, because it contains nonmetals.

1. Name the first element

The first element is phosphorous (P). Since this is the first element and there is only one, we don't need a prefix.

  • Phosphorous

2. Second element

The second element is chlorine (Cl). It has a subscript of 5, so we must add the prefix of <u>hepta</u>-.

  • Phosphorous heptachlorine

Add the ending of -ide.

  • Phosphorous heptachloride

The prefix used for the second element is hepta. The compound name is phosphorous heptachloride.

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2 years ago
I NEED HELP WITH NUMBER 3
vesna_86 [32]
The C stands for Specific Heat
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Sinkholes can form when _____?
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Water flows under the ground
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If an object moves in uniform circular motion in a circle of radius R=2.00 meters, and the object takes 5.00 seconds to
Minchanka [31]

Answer:

The centripetal acceleration of the object is 315.5\ m/s^2.  

Explanation:

We have,

Radius of a circular path is 2 m

It takes 5 seconds to complete 10 revolutions. It means its angular velocity is :

\omega=\dfrac{\Delta \theta}{\Delta t}\\\\\omega=\dfrac{2\pi \times 10}{5}\\\\\omega=12.56\ rad/s

The centripetal acceleration of the object is given by :

a=\omega^2 r\\\\a=(12.56)^2 \times 2\\\\a=315.5\ m/s^2

So, the centripetal acceleration of the object is 315.5\ m/s^2.

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3 years ago
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