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3 years ago

the atom was thought to be indivisible. Explain the significance of Thomson's concept of the electron.

Chemistry

1 answer:

Ludmilka [50]3 years ago

4 0

Answer:

Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup.

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9.0 mol Na2S can from 9.0 mol CuS and 8.0 mol CuSO4 can form 8.0 mol Cus.

ICE Princess25 [194]

Answer:

765.0 grams CuS

Explanation:

The limiting reagent is the reactant which completely reacts before the other reactant(s) is used up. When 9.0 moles Na₂S and 8.0 moles CuSO₄ react, it appears that CuSO₄ is the limiting reagent. You can tell because it results in the production of less product.

You can determine the mass of CuS by multiplying the moles by the molar mass. It is important to arrange the ratio in a way that allows for the cancellation of units.

Molar Mass (CuS): 95.62 g/mol

8.0 moles CuS 95.62 g
------------------------- x ----------------------- = 765.0 grams CuS
1 mole

4 0

2 years ago

Which example is an abiotic of an aquarium enviornment ? A. water

Artemon [7]

Answer:

the answer is water

Explanation:

because abiotic means non living and all of the other things are living

4 0

3 years ago

Hikers were climbing Mount McKinley and pitched camp part way up. While boiling eggs in water for breakfast, they noticed that t

qaws [65]

We know that the boiling temperature of the water depends on the atmospheric pressure.

Here we will find that the atmospheric pressure is 760.62 torr.

To get the atmospheric pressure we need to analyze the given information.

Boiling temperature = 79.0°C

∆Hvap = 40.7 kJ/mol

The equation we need to use is:

$ln(p_1/p_2) = \frac{\Delta H}{n*R} (\frac{1}{T_1} - \frac{1}{T_2} )$

Where:

p₁ = 1 atm

p₂ = what we want to know.

n*R = 8.314 J/K*mol

T₁ = (100° + 273.15°) = 374.15°

T₂ = (79.0 + 273.15°) = 352.15°K

We can replace all that in the equation to get:

$ln(1 atm/p_2) = \frac{40.7 kJ/mol}{8.314 J/K*mol} (\frac{1}{374.15\°K} - \frac{1}{352.15\°K} ) = -0.000817\\\\p_2 = (1atm)/exp(-0.000817) = 1.000817 atm$

And we want this in torr:

1 atm = 760 torr.

Then 1.000817 atm = 760.62 torr.

This is the pressure at the mountain.

if you want to learn more, you can read:

brainly.com/question/23358029

5 0

2 years ago

Choose the correct word from the drop-down menu to complete each sentence.

shepuryov [24]

Answer:

1) is humus

2)is loam

3)is sand

4)is silt

5)is clay

Explanation:

I did the quiz and got it right

4 0

3 years ago

Read 2 more answers

A student performs a crystallization on an impure sample of biphenyl. the sample weighs 0.5 g and contains about 5% impurity. ba

KatRina [158]

Hey There!

The weight of the starting compound includes the weight of the impurty also.When the crystalization techniques are performed ,The original compounds are only soluble in the suitable solvent but not the impurities.Hence in the result we get only the original compound weight.That is why the weight of the crystalization product to ber reduced than the starting compound.

6 0

3 years ago