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3 years ago

Which of these is a compound? О co2, O2, Co

Chemistry

1 answer:

Ivanshal [37]3 years ago

8 0

Answer:

co2 is a compound.

Explanation:

Oxygen(O) is an element having atomic number 8 and mass number 16.

Carbondioxide is a compound formed by burning of carbon and organic compound and it is a colorless and odorless gas.

O2 is the molecular form of Oxygen.

Cobalt(Co) is an element having atomic number 27 and mass number 59.

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2 years ago

In a certain compound of iron and oxygen, FexOy, it is found that a sample of this compound weighing 6.285 g contains 4.396 g of

saveliy_v [14]

Answer:

Formula of oxide is $Fe_{2}O_{3}$

Explanation:

The given compound consists of Fe and O.

So, mass of oxygen in sample = (mass of sample) - (mass of Fe in sample)

= (6.285 g ) - (4.396 g)

= 1.889 g

Molar mass of O = 16 g/mol and molar mass of Fe = 55.845 g/mol

So, ratio of number of moles of Fe and O (Fe : O)

= $\frac{4.396}{55.845}:\frac{1.889}{16}$

= 0.0787 : 0.118

= $1:\frac{0.118}{0.0787}$

= 1 : 1.5

= 2 : 3

So, formula of oxide is $Fe_{2}O_{3}$

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3 years ago

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lara [203]

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4 years ago

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Explanation:

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