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Chemistry

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Adolfo Bartoletti

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4y ago
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Cards in this guide (14)
Is CaS ionic

Yes, CaS is ionic.

Is a crucible and cover breakable

Yes.

They're usually made out of ceramics, porcelain, so they can break if dropped for instance.

What country was most closely related to communism

Soviet Union

Specific heat and latent heat of LPG

specific heat of lpg

Is phosphoros a metal oxide or a non metal oxide

Phosphorus is not an oxide. It is an element.

It is a nonmetal.

How do materials help us

We use them to perform tasks

What is the significant digits in 4000000

One - the four. None of the trailing 0s are significant digits.

Which group 15 element exists as a diatomic molecule at room temperature and pressure

Nitrogen

What are the compounds or ions for N2O5

N2O5 is a molecular compound, not ionic.

How many significant digits are in the number 129

All numbers which are not "zero" are classed as significant digits. Therefore in the number 129 there will be three digits which are classed as significant.

What is true of the League of Nations

america did not join the league

Which countries was most closely related to communism

It was the Soviet Union

Why sodium and pottasium are kept in kerosene

Sodium and Pottasium are metals reacts violently, and is stored to avoid contact with moisture in the air.

What family of elements contains the most active nonmetals

This is the halogens group: F., Cl, Br, I, At.

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