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Rzqust [24]
3 years ago
6

What is the molar mass of magnesium hydroxide

Chemistry
2 answers:
leonid [27]3 years ago
7 0
The molar mass of magnesium hydroxide is 58.3197 g/mol.
lutik1710 [3]3 years ago
7 0
<span>58.3197 g/mol . Its just a little tricky with the math.</span>
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When was the "Permian Era"?
klemol [59]

Answer:

298.9 million years ago - 251.902  million years ago

Explanation:

It might be in the 2011 Earth Science Review Packet so maybe go check that out

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3 years ago
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The vaporization of 1 mole of liquid water (system) at 100.9 C, 1.00 atm, is endothermic.
yan [13]

Answer:

a) The work done is 10.0777 kJ

b) The water's change in internal energy is -122.1973 kJ

Explanation:

Given data:

1 mol of liquid water

T₁ = temperature = 100.9°C

P = pressure = 1 atm

Endothermic reaction

T₂ = temperature = 100°C

1 mol of water vapor

VL = volume of liquid water = 18.8 mL = 0.0188 L

VG = volume of water vapor = 30.62 L

3.25 moles of liquid water vaporizes

Q = heat added to the system = -40.7 kJ

Questions: a) Calculate the work done on or by the system, W = ?

b) Calculate the water's change in internal energy, ΔU = ?

Heat for 3.25 moles:

Q_{1} =3.25*(-40.7)=-132.275kJ

The work done:

W=-nP*delta(V)=-3.25*101.33*(0.0188-30.62)=10077.6637J=10.0777kJ

The change in internal energy:

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7 0
3 years ago
When a reaction takes place in a SEALED FLASK,<br> the TOTAL MASS of the system...
Doss [256]
It should remain constant because of the law of conservation of mass and because the flask is sealed no mass will escape
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3 years ago
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Liula [17]

Answer:

0.006 48 km/s

Explanation:

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2. Convert hours to seconds

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Oksana_A [137]

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

Atomic mass of an atom is defined as the sum of number of neutrons and number of protons that are present in an atom. It is represented as 'A'.

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We are given:

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Number of neutrons = 6

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Hence, the correct answer is Option D.

6 0
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