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Mrrafil [7]
2 years ago
8

Petrified fossils are really

Chemistry
1 answer:
Anna35 [415]2 years ago
3 0
I think it would be either dead bodies or rocks? i dont really understand too well but sorry if this doesn’t help!! :((
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What is the oxidation state of P in PO43-?<br> O A. +8<br> O B. +3<br> O C. +5<br> OD. +2
erastovalidia [21]

Answer:

the answer is +5

Explanation:

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3 years ago
Which of the following statements is subjective? Van Gogh painted beautiful works of art. The planets revolve around the sun. Bl
mezya [45]
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There are two types of physical changes and chemical reactions- endothermic and exothermic. On the diagram below, which picture
Agata [3.3K]

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it is b because its releases heat in to all directions and not b because it staying inside and not releasing anything :)

Explanation:

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4 years ago
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Which of the fallowing would be a good that could be scientifically investigated
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3 years ago
A solid mixture consists of 47.6g of KNO3 (potassium nitrate) and 8.4g of K2SO4 (potassium sulfate). The mixture is added to 130
IgorLugansk [536]

<u>Answer:</u> No crystals of potassium sulfate will be seen at 0°C for the given amount.

<u>Explanation:</u>

We are given:

Mass of potassium nitrate = 47.6 g

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Mass of water = 130. g

Solubility of potassium sulfate in water at 0°C = 7.4 g/100 g

This means that 7.4 grams of potassium sulfate is soluble in 100 grams of water

Applying unitary method:

In 100 grams of water, the amount of potassium sulfate dissolved is 7.4 grams

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This means that, all of potassium sulfate will be dissolved.

Hence, no crystals of potassium sulfate will be seen at 0°C for the given amount.

7 0
3 years ago
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