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2 years ago

Which postulate of Dalton’s atomic theory has not been disproved by further investigation?

Chemistry

1 answer:

hram777 [196]2 years ago

5 0

Answer:

The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons...

hope this helps u

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Which statements describe how stars are born? Check all that apply. Stars are born in clouds of gas and dust called nebulas. The

prohojiy [21]

Answer: 1.Stars are born in clouds of gas and dust called nebulas.

2.The gas and dust are pulled together by gravity.

3.Heat and pressure cause nuclear fusion, which signals the birth of a star.

Explanation:

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2 years ago

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Why is useful to use moles to measure chemical quantities

MrRa [10]

Answer:

The mole is important because it allows chemists to work with the subatomic world with macro world units and amounts. Atoms, molecules and formula units are very small and very difficult to work with usually. However, the mole allows a chemist to work with amounts large enough to use.

Explanation:

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1 year ago

Elena makes the table below to determine the number of atoms of each element in the chemical formula 3(NH4)2SO4. A table with 3

Bumek [7]

Answer:

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Explanation:

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1 year ago

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A substance has a density of 4.5gmL. What is this in kgL? Report your answer with two significant figures.

Ipatiy [6.2K]

Answer:

4.5 kg/L

Explanation:

Density is 4.5g/mL and it means that in 1 mL of volume, the mass contained is 4.5 g.

Let's make a rule of three

1L = 1000 mL

1 mL has a mass of 4.5 g

1000 mL would have 4500 g

Our new density would be 4500 g/L, but we may convert the g to kg

1 kg / 1000 g . 4500 g = 4.5 kg

In conclusion 4.5 g/mL = 4.5 kg/L

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2 years ago

Gina wants to use models to better understand how the types of bonds in a molecule relate to the presence of geometric isomers.

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The answer to this question is D! The ball and stick model! Hope this helps :)

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1 year ago

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