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3 years ago

7. Which statement correctly describes the density of Earth's mantle compared to the density of Earth's

Chemistry

1 answer:

Mice21 [21]3 years ago

5 0

Answer:

1) the mantle is less dense than the core but more dense than the crust.

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A student heats a sample of hydrate once, and the mass of the sample and the evaporating dish is 16.428 g. After a second heatin

jolli1 [7]

Answer:

12.371 g

Explanation:

Given :

$m_{evaporating\ dish}=1.135\ g$

$m_{evaporating\ dish}+m_{Hydrate\ sample}=25.637\ g$

$m_{evaporating\ dish}+m_{First\ heated\ sample}=16.428\ g$

$m_{evaporating\ dish}+m_{Second\ heated\ sample}=13.266\ g$

Mass of salt hydrate:

$m_{evaporating\ dish}=1.135\ g$

$m_{evaporating\ dish}+m_{Hydrate\ sample}=25.637\ g$

$m_{Hydrate\ sample}=25.637-m_{evaporating\ dish}\ g=25.637-1.135\ g=24.502\ g$

Mass of salt anhydrous:

$m_{evaporating\ dish}=1.135\ g$

$m_{evaporating\ dish}+m_{Second\ heated\ sample}=13.266\ g$

$m_{Second\ heated\ sample}=m_{salt\ anhydrous}=13.266-m_{evaporating\ dish}\ g=13.266-1.135\ g=12.131\ g$

Mass of water:

$m_{water}=m_{Hydrate\ sample}-m_{salt\ anhydrous}=24.502-12.131\ g=12.371\ g$

$m_{water}=12.371\ g$

4 0

4 years ago

Helium is most likely to behave as an ideal gas when it is under(1) high pressure and high temperature(2) high pressure and low

Mekhanik [1.2K]

Helium is most likely to behave as an ideal gas when it is under 2) High pressure and low temperature.

3 0

4 years ago

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This is the chemical formula for acetone: CH32CO. Calculate the mass percent of carbon in acetone.

olga_2 [115]

Answer:

62.07 %

Explanation:

Chemical Formula = (CH3)2CO = C3H6O

Mass of C = 12 g/mol

Mass of H = 1 g/mol

Mass of O = 12 g/mol

Mass of C3H6O = 3(12) + 6(1) + 16 = 58 g/mol

Total mass of C in Acetone = 12 * 3 = 36 g

Mass Percent of C = Total mass of C / Mass of Acetone * 100

Mass percent = 36 / 58 * 100

Mass percent = 62.07 %

6 0

3 years ago

Help mee, thank you. Science. Due tonight and I am very tired now :/

madreJ [45]

The first question it would would release the same amount.the answer to the second question would be the experimental group.

3 0

3 years ago

Salt is dissolved in a flask of tap water. Distilling the mixture causes the salt to separate from the water. Which type of ener

Juliette [100K]

D.

The water must be heated and removed in distillation, so thermal energy is required.

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3 years ago

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