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dezoksy [38]
3 years ago
5

Where does lava in volcanoes come from?

Chemistry
1 answer:
Stella [2.4K]3 years ago
4 0
Magma can push through holes or cracks in the crust of the volcano, causing a volcanic eruption. Which is when magma flows or erupts onto earth's surface, which is what you call lava (whenever it goes onto the earths surface).
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Which of the following best describe the chronological way of specimen preparation?
nata0808 [166]

Answer:

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<em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>helps</u></em><em><u> </u></em>

8 0
2 years ago
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Can Hydrogen hydrogen bond with itself? <br><br> Example:<br> Is H-H a hydrogen bond?
telo118 [61]
It can form dipole-dipole interactions but that’s all
6 0
3 years ago
Green (Gg) Is crossed with a yellow pea plant (Gg )
Kobotan [32]
GG | Gg
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5 0
3 years ago
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The zinc within a copper-plated penny will dissolve in hydrochloric acid if the copper coating is filed down in several spots (s
Mrac [35]

Answer:

Mass of hydrogen gas evolved is 0.0749 grams.

Explanation:

Total pressure of the gases = p = 758 mmHg

Vapor pressure of water = 23.78 mmHg

Pressure of hydrogen gas ,P =  p - 23.78 mmHg = 758 mmHg - 23.78 mmHg

P = 734.22 mmHg = \frac{734.22}{760} atm=0.966 atm

Temperature  of of hydrogen gas ,T= 25°C =298.15 K

Volume of hydrogen gas = V = 0.949 L

Moles of hydrogen gas =n

PV = nRT (Ideal gas equation )

n=\frac{PV}{RT}=\frac{0.966 atm\times 0.949 L}{0.0821 atm L/mol K\times 298.15 K}

n = 0.03745 mol

Moles of hydrogen gas = 0.03745 mol

Mass of  0.03745 moles of hydrogen gas  = 0.03745 mol × 2 g/mol = 0.0749 g

Mass of hydrogen gas evolved is 0.0749 grams.

3 0
4 years ago
How many electrons are in the n = 2 shell of a magnesium atom?
Montano1993 [528]

Answer:

eight

Explanation:

That means there are 12 electrons in a magnesium atom

hope this helps

8 0
3 years ago
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