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Chemistry

Chemistry
What are the number of moles of CO2 which contains 16 g of oxygen?

0.4 mole
0.2 mole
0.5 mole
0.25 mole

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Chemistry
The components of water can be separated by

Physical methods
Both A and B
They can not be separated
Chemical methods

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Chemistry
The most abundant element by number in the living system is :

Oxygen
Carbon
Nitrogen
Hydrogen

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Chemistry
Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ?

Pyrolysis and Gasification
Landfills
All listed here
Incineration

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Chemistry
Molality of pure water is

5.55
18
55.5
1.8

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Chemistry
The fat of a common mussel-secretes a sticky glue that can be used to make heart implants. The unique chemical compound present in the glue is:

Phenyl alanine
Amino phenyl alanine
Hydroxy phenyl alanine
Dihydroxy phenyl alanine

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