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3 years ago

Check the statements that are a part of the early atomic theory. Check all of the boxes that apply

Chemistry

2 answers:

Shalnov [3]3 years ago

6 0

What's the options? I'm confused

Hitman42 [59]3 years ago

5 0

Answer:B AND C

b. Atoms combine in whole number ratios to form compounds.

c.Atoms cannot be created or destroyed during a chemical reaction.

Explanation: THE ANSWER CHOICES ARE:

Scientists believe that the atom is made up of elements.

Atoms combine in whole number ratios to form compounds.

Atoms cannot be created or destroyed during a chemical reaction.

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4. The solubility of acetanilide in hot water is 5.5 g / 100 mL at 100oC and its solubility in cold water is 0.53 g / 100 mL at

Triss [41]

Answer:

89,4%

Explanation:

If you have a solutio of 2,5g of acetanilide in 50mL of water and you warm this solution to 100°C you will dissolve all acetanilide because the maximum solubility in 50mL will be:

5,5g / 100mL → 2,75g / 50mL.

Then, if you cold the water to 0°C the solubility in 50mL will be:

0,53g / 100mL → 0,265g / 50mL.

That means you will precipitate:

2,5g - 0,265g = 2,235g of acetanilide

The theoretical percent recovery will be:

2,2365g / 2,5g ×100 = 89,4%

I hope it helps!

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3 years ago

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Soloha48 [4]

Factor that can be controlled changed or measured in an experiment.

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3 years ago

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liubo4ka [24]

Answer:a

Explanation:

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3 years ago

What is electroluminescence? Give one example.

vredina [299]

Answer:

electroluminescence is a production of light by the flow of electrons, as within certain crystals. An example is at most resataurants with a bright sign that either says open or closed.

Explanation:

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3 years ago

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Ivanshal [37]

Answer:

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