3 years ago

Which best explains why the atomic theory is a scientific one?

Chemistry

1 answer:

kap26 [50]3 years ago

4 0

Answer:

A,the theory describes what atoms are and has not changed over time

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help!! i tried answering these on my own and turning it into my teacher and she said they were all wrong , can somebody help me

Kobotan [32]

I don't know what your answers were but the more "stuff" there is the more energy it takes to freeze or boil it. Hope this could help

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3 years ago

List at least two chemical reactions that resulted in a white precipitate. For these reactions list the possible chemical name o

Alina [70]

Barium chloride + sodium sulphate --> barium sulphate + sodium chloride
BaCl2 + Na2SO4 ---> BaSO4 + 2 NaCl
The barium sulphate appears as a white precipitate

Silver nitrate + Sodium chloride ---> Silver Chloride + sodium nitrate
AgNO3 + NaCl ----> AgCl + NaNO3
The silver chloride appears as a white precipitate.

These are sometimes called double decomposition reactions.

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3 years ago

What type of molecule is shown below?

stealth61 [152]

The type of molecule that is shown is D. Alcohol

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Liquid nitrogen is cold and can be used to cool objects to -196°C. If you put the bottle of warm air in liquid nitrogen at this

vampirchik [111]

Answer:

Explanation:

It depends on how this is done. If you raise the pressure, the nitrogen will disappear (liquify) and all that will be left will be the 21 % oxygen and the 1% argon.

The process is very complicated because the boiling point of nitrogen keeps on changing. The boiling point is unstable.

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3 years ago

Element: calcium symbol: Ca Atomic weight: g Mass of one mole: g/mol

Elena-2011 [213]

153g/mols I think this is the answer but not 100% sure.

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3 years ago