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liubo4ka [24]
3 years ago
5

How does the Law of Conservation of Matter apply to you when you eat food? Why do you not continuously gain exactly the amount o

f mass you consume with each meal?
Chemistry
1 answer:
jek_recluse [69]3 years ago
3 0
Because the law states that matter can neither be created nor destroyed but changed in form. And the same goes for energy that the body takes from the food, we give off that energy through heat and movement. Hope this helped!
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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>-.

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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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3 years ago
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What does Mg stand for in chemistry
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Mg is the chemical symbol for Magnesium. 
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Calculate the number of atoms of copper represented by 127.08 g of copper.
frosja888 [35]
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