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olchik [2.2K]
3 years ago
5

Aluminium is produced by electrolysis of a molten mixture.

Chemistry
1 answer:
Murljashka [212]3 years ago
7 0

Answer:

cryolite and oxide

Explanation:

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If 13.0 g of MgSO4⋅7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain?
Paul [167]

6.349 g mass of anhydrous magnesium sulfate will remain.

<h3>What are moles?</h3>

A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Molar mass MgSO₄.7 H₂O = 246.52 g/mol

Moles =\frac{mass}{molar \;mass}

Moles =\frac{13.0 g}{246.52}

0.0527 moles

Molar mass MgSO₄ = 120.4 g/mol

Mass of anhydrous magnesium sulfate :

( 0.0527 x 120.4 ) => 6.349 g

Learn more about moles here:

brainly.com/question/8455949

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4 0
1 year ago
What are the laws of Newton?
Tanzania [10]

Answer:

an object that is at rest will stay at rest inless a force acts upon it.

An oject that is in motion will not change its velocity unless a force acts upon it.

4 0
3 years ago
Read 2 more answers
What is the process by which molecules of water vapor in the air become liquid water?
mote1985 [20]
That is called condensation
5 0
3 years ago
2MG+O2 ...........2MGO
Galina-37 [17]
Mg + 1/2 O2 → MgO

1 mol = 24 g of Mg

X mol = 12 g of Mg

x = 0.5 moles of Mg

Mg :MgO = 1:1 (coefficient from equations using mole ratio)

So

0.5 moles of MgO

1 mol MgO = (24+16) g = 40 g

0.5 moles of MgO = 0.5 × 40

= 20 g of MgO produced
5 0
2 years ago
A barrel of water weighs 60 pounds. What must you put in it for it to weigh 40 pounds?
astraxan [27]

Answer:

A hole

Explanation:

put a hole in the barrel and let some water out

3 0
3 years ago
Read 2 more answers
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