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3 years ago

The force of gravity always pulls ____

Chemistry

1 answer:

damaskus [11]3 years ago

6 0

Down...
and if you were wondering, the earth pushes back

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What Energy transformation occurs when gasoline burns in an automobile

Gelneren [198K]

Answer:

The release of energy from fuels is used to make other forms of energy. When gasoline burns in a car engine, some of the chemical energy in the gasoline is converted into heat. The heat is converted into mechanical energy. The mechanical energy moves the car.I hope this helped!

Explanation:

5 0

2 years ago

Read 2 more answers

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sergejj [24]

I would say the third one.

6 0

3 years ago

During the electrolysis of cryolite ,aluminium and fluorine are formed in.......molar ratio

PtichkaEL [24]

${\huge{\boxed{\sf{\pink{☛Answer࿐}}}}}$

From the first mechanism, it can be seen that the Aluminum is reduced at cathode and Florine is oxidized at anode.

The ratio of aluminium and fluorine is the ratio of their change in oxidation number, i.e. 2:3

༒HOPE SO IT HELPS YOU༒

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8 0

2 years ago

When bonded with four hydrogen atoms, carbon has which shape?

jolli1 [7]

When carbon bonds with 4 hydrogen atoms which is methane having sp3 structure so it is tetrahedral. electricity is conducted by electrons so graphite conducts by free and delocalised sea of electrons.

3 0

2 years ago

How many lead (Pb) atoms are in a 5.32 g sample of pure lead?

Elanso [62]

Answer:

1.55×10²² molecules.

Explanation:

We'll begin by calculating the number of mole in 5.32 g of pure lead (Pb). This can be obtained as follow:

Mass of Pb = 5.32 g

Molar mass of Pb = 207 g/mol

Mole of Pb =?

Mole = mass /molar mass

Mole of Pb = 5.32/207

Mole of Pb = 0.0257 mole

Finally, we shall determine the number of molecules in 0.0257 mole of Pb. This can be obtained as follow:

From Avogadro's hypothesis,

I mole of Pb contains 6.02×10²³ molecules.

Therefore, 0.0257 mole will contain = 0.0257 × 6.02×10²³ = 1.55×10²² molecules.

Therefore, 5.32 g of pure lead (Pb) contains 1.55×10²² molecules.

4 0

2 years ago