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2 years ago

Is phosphorus a pure substance or mixture

Chemistry

2 answers:

nataly862011 [7]2 years ago

8 0

its mixture

Explanation:

phosphorus atoms has 15 electrons and 15 protons with valence 5 electron in outer shell and is highly reactive element

Goshia [24]2 years ago

3 0

Answer: it is Not a pure substance because it consists of sodium so it would be a mixture because it contains sodium

Explanation:

plz mark brainliest

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What is the substance that is formed when the acid react with bases in a neutralization reaction?

Leya [2.2K]

Answer:

Water and Salt

Explanation:

A neutralization reaction occurs when an acid and a base react to produce water and a salt, and it entails the formation of water from the mixture of H+ and OH- ions.

4 0

2 years ago

Read 2 more answers

Describe two situations that reduce the dissolved oxygen content of water?

Olin [163]

Hi sweetie, hope this helps!

The more salt that is dissolved in the water, the less oxygen will be dissolved in it.

The higher the temperature of the water, the less oxygen will be dissolved it in.

Goodluck!,
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2 years ago

If 0.089 grams of KI is dissolved in 500g of H2O, what is the concentration of the resulting solution in parts per million?

frez [133]

Answer:

The concentration of the resulting solution in parts per million is 177.97

Explanation:

Parts per million (ppm), is a unit of measure for concentration that refers to the number of units of the substance per million units of the set.

The concentration in parts per million expressed in mass / mass is calculated by dividing the mass of the solute (ms) by the mass of the solution (md, sum of the mass of the solute and the mass of the solvent), both expressed in the same unit and multiplied by 10⁶ (1 million).

$ppm=\frac{ms}{md} *10^{6}$

So, being:

ms: 0.089 grams of KI

md: 0.089 grams of KI + 500 grams of H₂O= 500.089 grams

Replacing:

$ppm=\frac{0.089 grams}{500.089 grams}*10^{6}$

ppm= 177.97

The concentration of the resulting solution in parts per million is 177.97

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2 years ago

Give an example of when a plant or animal might use energy they have stored.

olasank [31]

Answer:

hunting for other animals or when they are really hungry

Explanation:

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2 years ago

Propane burns in air to produce carbon dioxide and water?

Elan Coil [88]

Hey there!
Great question=)

Yes, this statement is true! Propane burns in air and it produces carbon dioxide and water.

I hope this helps;)

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2 years ago