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3 years ago

Give a definition of mixture? Why air is called a mixture?

Chemistry

1 answer:

anzhelika [568]3 years ago

8 0

Question

Give a definition of mixture?

Why air is called a mixture?

Answer:

mixture - substance made by combining two more different materials in such a way that no chemical reaction occurs.

Air is a mixture because it is composed of gases like inert gases, carbon dioxide, oxygen, nitrogen an so on. Also dust particles are present in the atmosphere so air is a mixture .

Explanation:

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natural selection is an example of a mechanism of evolution does this mechanism produce a change in individuals or populations e

skad [1K]

Answer: Yes, Natural selection is natures way of making the fittest and top dogs of the food chain, It can produce a change in individuals and populations by completely reducing or wiping out a population not fit for survival in its inviroment and can even force a change of the creature to make it able to survive.

Example: would be rabbits, a snow rabbit wouldn't survive very well in the desert and a jack rabbit wouldn't be able to survive in the cold winter due to temp and the fact that predators like wolves would be able to spot it easier from its color of its fur.

Note: Hope this helps, and I hope this is want it was asking. Good luck :)

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3 years ago

James has three cubes with identical dimensions. He places the blocks in water, as shown below.

Fantom [35]

Answer:I think it could be A or B but I would choose A.

Explanation:

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3 years ago

Number of grams in 4 mols of cu(no2)2

Drupady [299]

151.55 x 4 you have to add the molar masses for each element together.

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3 years ago

Read 2 more answers

Which statement describes compounds?

Natasha2012 [34]

Answer:

Explanation:

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2 years ago

When lithium nitride, Li3N(s) , is treated with water, H2O(l) , ammonia, NH3(g) , is produced. Predict the formula of the gas pr

Ronch [10]

<u>Answer:</u> The gas produced when sodium phosphide reacts with water is phosphine.

<u>Explanation:</u>

When sodium phosphide reacts with water molecule, it leads to the production of flammable, poisonous gas known as phosphine along with the production of sodium hydroxide.

The chemical reaction for the reaction of sodium phosphide with water follows the equation:

$Na_3P(aq.)+3H_2O(l)\rightarrow PH_3(g)+3NaOH(aq.)$

By Stoichiometry of the reaction:

1 mole of sodium phosphide reacts with 3 moles of water to produce 1 mole of phosphine gas and 3 moles of sodium hydroxide.

Hence, the gas produced when sodium phosphide reacts with water is phosphine.

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3 years ago