3 years ago

Which one could be considered pure substances? And why

Chemistry

2 answers:

ladessa [460]3 years ago

8 0

I think it oxygen cuz water has two substance which is H2O

Sergeu [11.5K]3 years ago

6 0

I think it would be water but im not sure! Hope that helps!!

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What do these two changes have in common? snails growing shells a slice of banana turning brown

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3 years ago

Show all calculations. 1. 2 C 4 H 10 + 13 O 2 -> 8 CO 2 + 10 H 2 O a) what mass of O 2 will react with 400 g C 4 H 10? b) how

bazaltina [42]

$\\ \tt\hookrightarrow 2C_4H_10+13O_2\longrightarrow 8CO_2+10H_2O$

13mol of O_2 reacts with 2mols of C_4H_10.
7.5mol of O_2 reacts with 1mol of C_4H_10

No of moles:-

$\\ \tt\hookrightarrow \dfrac{Given\:mass}{Molar\:mass}$

$\\ \tt\hookrightarrow \dfrac{400}{58}$

$\\ \tt\hookrightarrow 6.89mol$

Now

Moles of O_2

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Mass of O_2

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2 years ago

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3 years ago

Which type of reaction is Mg + S → MgS?

Aleksandr [31]

The type of reaction that is Mg +S→ MgS is a synthesis reaction

<u><em>Explanation</em></u>

Synthesis reaction as refers to as direct combination is a reaction in which two or more chemical species combine to form more complex product.

The reaction of Mg +S → MgS is a synthesis reaction because;

Mg combine with S to form a more complex product MgS

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Read 2 more answers

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